[{"data":1,"prerenderedAt":1424},["ShallowReactive",2],{"navigation_docs":3,"-reference-cost":612,"-reference-cost-surround":1419},[4,35,85,138,318,453,489,548,587],{"title":5,"path":6,"stem":7,"children":8,"page":34},"Start","\u002Fstart","1.start",[9,14,19,24,29],{"title":10,"path":11,"stem":12,"icon":13},"Introduction","\u002Fstart\u002Fintroduction","1.start\u002F1.introduction","i-lucide-info",{"title":15,"path":16,"stem":17,"icon":18},"Why start with evlog","\u002Fstart\u002Fwhy-evlog","1.start\u002F2.why-evlog","i-lucide-rocket",{"title":20,"path":21,"stem":22,"icon":23},"Installation","\u002Fstart\u002Finstallation","1.start\u002F3.installation","i-lucide-download",{"title":25,"path":26,"stem":27,"icon":28},"Quick Start","\u002Fstart\u002Fquick-start","1.start\u002F4.quick-start","i-lucide-zap",{"title":30,"path":31,"stem":32,"icon":33},"Choose your logger","\u002Fstart\u002Ftypescript-logging-library","1.start\u002F5.typescript-logging-library","i-lucide-file-code",false,{"title":36,"path":37,"stem":38,"children":39,"page":34},"Learn","\u002Flearn","2.learn",[40,45,50,55,60,65,70,75,80],{"title":41,"path":42,"stem":43,"icon":44},"Overview","\u002Flearn\u002Foverview","2.learn\u002F0.overview","i-lucide-list",{"title":46,"path":47,"stem":48,"icon":49},"Simple Logging","\u002Flearn\u002Fsimple-logging","2.learn\u002F1.simple-logging","i-lucide-terminal",{"title":51,"path":52,"stem":53,"icon":54},"Wide Events","\u002Flearn\u002Fwide-events","2.learn\u002F2.wide-events","i-lucide-layers",{"title":56,"path":57,"stem":58,"icon":59},"Structured Errors","\u002Flearn\u002Fstructured-errors","2.learn\u002F3.structured-errors","i-lucide-shield-alert",{"title":61,"path":62,"stem":63,"icon":64},"Lifecycle","\u002Flearn\u002Flifecycle","2.learn\u002F4.lifecycle","i-lucide-arrow-right-left",{"title":66,"path":67,"stem":68,"icon":69},"Sampling","\u002Flearn\u002Fsampling","2.learn\u002F5.sampling","i-lucide-filter",{"title":71,"path":72,"stem":73,"icon":74},"Auto-Redaction","\u002Flearn\u002Fredaction","2.learn\u002F6.redaction","i-lucide-eye-off",{"title":76,"path":77,"stem":78,"icon":79},"Typed Fields","\u002Flearn\u002Ftyped-fields","2.learn\u002F7.typed-fields","i-simple-icons-typescript",{"title":81,"path":82,"stem":83,"icon":84},"Catalogs","\u002Flearn\u002Fcatalogs","2.learn\u002F8.catalogs","i-lucide-book-open",{"title":86,"path":87,"stem":88,"children":89,"page":34},"CLI","\u002Fcli","3.cli",[90,93,98,103,108,113,118,123,128,133],{"title":41,"path":91,"stem":92,"icon":49},"\u002Fcli\u002Foverview","3.cli\u002F0.overview",{"title":94,"path":95,"stem":96,"icon":97},"init","\u002Fcli\u002Finit","3.cli\u002F1.init","i-lucide-wand-sparkles",{"title":99,"path":100,"stem":101,"icon":102},"map","\u002Fcli\u002Fmap","3.cli\u002F2.map","i-lucide-radar",{"title":104,"path":105,"stem":106,"icon":107},"Rules","\u002Fcli\u002Frules","3.cli\u002F3.rules","i-lucide-list-checks",{"title":109,"path":110,"stem":111,"icon":112},"Scoring","\u002Fcli\u002Fscoring","3.cli\u002F4.scoring","i-lucide-gauge",{"title":114,"path":115,"stem":116,"icon":117},"CI","\u002Fcli\u002Fci","3.cli\u002F5.ci","i-lucide-git-pull-request",{"title":119,"path":120,"stem":121,"icon":122},"doctor","\u002Fcli\u002Fdoctor","3.cli\u002F6.doctor","i-lucide-stethoscope",{"title":124,"path":125,"stem":126,"icon":127},"telemetry","\u002Fcli\u002Ftelemetry","3.cli\u002F7.telemetry","i-lucide-bar-chart-3",{"title":129,"path":130,"stem":131,"icon":132},"agents","\u002Fcli\u002Fagents","3.cli\u002F8.agents","i-lucide-bot",{"title":134,"path":135,"stem":136,"icon":137},"Observability Score","\u002Fcli\u002Fobservability-score","3.cli\u002F9.observability-score","i-lucide-activity",{"title":139,"path":140,"stem":141,"children":142,"page":34},"Integrate","\u002Fintegrate","4.integrate",[143,147,230],{"title":41,"path":144,"stem":145,"icon":146},"\u002Fintegrate\u002Foverview","4.integrate\u002F0.overview","i-lucide-plug",{"title":148,"path":149,"stem":150,"children":151,"page":34},"Adapters","\u002Fintegrate\u002Fadapters","4.integrate\u002Fadapters",[152,155,185,210],{"title":41,"path":153,"stem":154,"icon":44},"\u002Fintegrate\u002Fadapters\u002Foverview","4.integrate\u002Fadapters\u002F01.overview",{"title":156,"path":157,"stem":158,"children":159,"page":34},"Cloud","\u002Fintegrate\u002Fadapters\u002Fcloud","4.integrate\u002Fadapters\u002Fcloud",[160,165,170,175,180],{"title":161,"path":162,"stem":163,"icon":164},"Axiom","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Faxiom","4.integrate\u002Fadapters\u002Fcloud\u002F01.axiom","i-custom-axiom",{"title":166,"path":167,"stem":168,"icon":169},"PostHog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fposthog","4.integrate\u002Fadapters\u002Fcloud\u002F02.posthog","i-simple-icons-posthog",{"title":171,"path":172,"stem":173,"icon":174},"Sentry","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fsentry","4.integrate\u002Fadapters\u002Fcloud\u002F03.sentry","i-simple-icons-sentry",{"title":176,"path":177,"stem":178,"icon":179},"Better Stack","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fbetter-stack","4.integrate\u002Fadapters\u002Fcloud\u002F04.better-stack","i-simple-icons-betterstack",{"title":181,"path":182,"stem":183,"icon":184},"Datadog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fdatadog","4.integrate\u002Fadapters\u002Fcloud\u002F05.datadog","i-simple-icons-datadog",{"title":186,"path":187,"stem":188,"children":189,"page":34},"Cloud or Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fhybrid","4.integrate\u002Fadapters\u002Fhybrid",[190,195,200,205],{"title":191,"path":192,"stem":193,"icon":194},"Grafana Loki","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Floki","4.integrate\u002Fadapters\u002Fhybrid\u002F01.loki","i-simple-icons-grafana",{"title":196,"path":197,"stem":198,"icon":199},"ClickHouse","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fclickhouse","4.integrate\u002Fadapters\u002Fhybrid\u002F02.clickhouse","i-simple-icons-clickhouse",{"title":201,"path":202,"stem":203,"icon":204},"OTLP","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fotlp","4.integrate\u002Fadapters\u002Fhybrid\u002F03.otlp","i-simple-icons-opentelemetry",{"title":206,"path":207,"stem":208,"icon":209},"HyperDX","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fhyperdx","4.integrate\u002Fadapters\u002Fhybrid\u002F04.hyperdx","i-custom-hyperdx",{"title":211,"path":212,"stem":213,"children":214,"page":34},"Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fself-hosted","4.integrate\u002Fadapters\u002Fself-hosted",[215,220,225],{"title":216,"path":217,"stem":218,"icon":219},"File System","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Ffs","4.integrate\u002Fadapters\u002Fself-hosted\u002F01.fs","i-lucide-hard-drive",{"title":221,"path":222,"stem":223,"icon":224},"NuxtHub","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fnuxthub","4.integrate\u002Fadapters\u002Fself-hosted\u002F02.nuxthub","i-simple-icons-nuxt",{"title":226,"path":227,"stem":228,"icon":229},"Memory","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fmemory","4.integrate\u002Fadapters\u002Fself-hosted\u002F03.memory","i-lucide-cpu",{"title":231,"path":232,"stem":233,"children":234,"page":34},"Frameworks","\u002Fintegrate\u002Fframeworks","4.integrate\u002Fframeworks",[235,239,244,249,254,259,264,269,274,279,284,289,294,299,303,308,313],{"title":41,"path":236,"stem":237,"icon":238},"\u002Fintegrate\u002Fframeworks\u002Foverview","4.integrate\u002Fframeworks\u002F00.overview","i-lucide-layout-grid",{"title":240,"path":241,"stem":242,"icon":243},"Nuxt","\u002Fintegrate\u002Fframeworks\u002Fnuxt","4.integrate\u002Fframeworks\u002F01.nuxt","i-simple-icons-nuxtdotjs",{"title":245,"path":246,"stem":247,"icon":248},"Next.js","\u002Fintegrate\u002Fframeworks\u002Fnextjs","4.integrate\u002Fframeworks\u002F02.nextjs","i-simple-icons-nextdotjs",{"title":250,"path":251,"stem":252,"icon":253},"SvelteKit","\u002Fintegrate\u002Fframeworks\u002Fsveltekit","4.integrate\u002Fframeworks\u002F03.sveltekit","i-simple-icons-svelte",{"title":255,"path":256,"stem":257,"icon":258},"Nitro","\u002Fintegrate\u002Fframeworks\u002Fnitro","4.integrate\u002Fframeworks\u002F04.nitro","i-custom-nitro",{"title":260,"path":261,"stem":262,"icon":263},"TanStack Start","\u002Fintegrate\u002Fframeworks\u002Ftanstack-start","4.integrate\u002Fframeworks\u002F05.tanstack-start","i-custom-tanstack",{"title":265,"path":266,"stem":267,"icon":268},"NestJS","\u002Fintegrate\u002Fframeworks\u002Fnestjs","4.integrate\u002Fframeworks\u002F06.nestjs","i-simple-icons-nestjs",{"title":270,"path":271,"stem":272,"icon":273},"Express","\u002Fintegrate\u002Fframeworks\u002Fexpress","4.integrate\u002Fframeworks\u002F07.express","i-simple-icons-express",{"title":275,"path":276,"stem":277,"icon":278},"Hono","\u002Fintegrate\u002Fframeworks\u002Fhono","4.integrate\u002Fframeworks\u002F08.hono","i-simple-icons-hono",{"title":280,"path":281,"stem":282,"icon":283},"Fastify","\u002Fintegrate\u002Fframeworks\u002Ffastify","4.integrate\u002Fframeworks\u002F09.fastify","i-simple-icons-fastify",{"title":285,"path":286,"stem":287,"icon":288},"Elysia","\u002Fintegrate\u002Fframeworks\u002Felysia","4.integrate\u002Fframeworks\u002F10.elysia","i-custom-elysia",{"title":290,"path":291,"stem":292,"icon":293},"React Router","\u002Fintegrate\u002Fframeworks\u002Freact-router","4.integrate\u002Fframeworks\u002F11.react-router","i-custom-reactrouter",{"title":295,"path":296,"stem":297,"icon":298},"Cloudflare Workers","\u002Fintegrate\u002Fframeworks\u002Fcloudflare-workers","4.integrate\u002Fframeworks\u002F12.cloudflare-workers","i-simple-icons-cloudflare",{"title":300,"path":301,"stem":302,"icon":79},"Standalone","\u002Fintegrate\u002Fframeworks\u002Fstandalone","4.integrate\u002Fframeworks\u002F13.standalone",{"title":304,"path":305,"stem":306,"icon":307},"Astro","\u002Fintegrate\u002Fframeworks\u002Fastro","4.integrate\u002Fframeworks\u002F14.astro","i-simple-icons-astro",{"title":309,"path":310,"stem":311,"icon":312},"oRPC","\u002Fintegrate\u002Fframeworks\u002Forpc","4.integrate\u002Fframeworks\u002F15.orpc","i-lucide-network",{"title":314,"path":315,"stem":316,"icon":317},"AWS Lambda","\u002Fintegrate\u002Fframeworks\u002Faws-lambda","4.integrate\u002Fframeworks\u002F16.aws-lambda","i-custom-lambda",{"title":319,"path":320,"stem":321,"children":322,"page":34},"Use Cases","\u002Fuse-cases","5.use-cases",[323,326,331,359,386,418,439,444,449],{"title":41,"path":324,"stem":325,"icon":107},"\u002Fuse-cases\u002Foverview","5.use-cases\u002F0.overview",{"title":327,"path":328,"stem":329,"icon":330},"Client Logging","\u002Fuse-cases\u002Fclient-logging","5.use-cases\u002F1.client-logging","i-lucide-monitor",{"title":332,"icon":333,"path":334,"stem":335,"children":336,"page":34},"AI SDK","i-simple-icons-vercel","\u002Fuse-cases\u002Fai-sdk","5.use-cases\u002F2.ai-sdk",[337,340,345,350,355],{"title":41,"path":338,"stem":339,"icon":44},"\u002Fuse-cases\u002Fai-sdk\u002Foverview","5.use-cases\u002F2.ai-sdk\u002F01.overview",{"title":341,"path":342,"stem":343,"icon":344},"Usage","\u002Fuse-cases\u002Fai-sdk\u002Fusage","5.use-cases\u002F2.ai-sdk\u002F02.usage","i-lucide-code",{"title":346,"path":347,"stem":348,"icon":349},"Options","\u002Fuse-cases\u002Fai-sdk\u002Foptions","5.use-cases\u002F2.ai-sdk\u002F03.options","i-lucide-sliders",{"title":351,"path":352,"stem":353,"icon":354},"Metadata","\u002Fuse-cases\u002Fai-sdk\u002Fmetadata","5.use-cases\u002F2.ai-sdk\u002F04.metadata","i-lucide-database",{"title":356,"path":357,"stem":358,"icon":137},"Telemetry","\u002Fuse-cases\u002Fai-sdk\u002Ftelemetry","5.use-cases\u002F2.ai-sdk\u002F05.telemetry",{"title":360,"icon":361,"path":362,"stem":363,"children":364,"page":34},"Better Auth","i-simple-icons-betterauth","\u002Fuse-cases\u002Fbetter-auth","5.use-cases\u002F3.better-auth",[365,368,373,378,382],{"title":41,"path":366,"stem":367,"icon":44},"\u002Fuse-cases\u002Fbetter-auth\u002Foverview","5.use-cases\u002F3.better-auth\u002F01.overview",{"title":369,"path":370,"stem":371,"icon":372},"Identify User","\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user","5.use-cases\u002F3.better-auth\u002F02.identify-user","i-lucide-user-check",{"title":374,"path":375,"stem":376,"icon":377},"Middleware","\u002Fuse-cases\u002Fbetter-auth\u002Fmiddleware","5.use-cases\u002F3.better-auth\u002F03.middleware","i-lucide-shield",{"title":379,"path":380,"stem":381,"icon":330},"Client Sync","\u002Fuse-cases\u002Fbetter-auth\u002Fclient-sync","5.use-cases\u002F3.better-auth\u002F04.client-sync",{"title":383,"path":384,"stem":385,"icon":112},"Performance","\u002Fuse-cases\u002Fbetter-auth\u002Fperformance","5.use-cases\u002F3.better-auth\u002F05.performance",{"title":387,"icon":388,"path":389,"stem":390,"children":391,"page":34},"Audit Logs","i-lucide-shield-check","\u002Fuse-cases\u002Faudit","5.use-cases\u002F4.audit",[392,395,400,405,410,414],{"title":41,"path":393,"stem":394,"icon":44},"\u002Fuse-cases\u002Faudit\u002Foverview","5.use-cases\u002F4.audit\u002F01.overview",{"title":396,"path":397,"stem":398,"icon":399},"Schema","\u002Fuse-cases\u002Faudit\u002Fschema","5.use-cases\u002F4.audit\u002F02.schema","i-lucide-file-text",{"title":401,"path":402,"stem":403,"icon":404},"Recording","\u002Fuse-cases\u002Faudit\u002Frecording","5.use-cases\u002F4.audit\u002F03.recording","i-lucide-pen-line",{"title":406,"path":407,"stem":408,"icon":409},"Drains","\u002Fuse-cases\u002Faudit\u002Fpipeline","5.use-cases\u002F4.audit\u002F04.pipeline","i-lucide-link",{"title":411,"path":412,"stem":413,"icon":388},"Compliance","\u002Fuse-cases\u002Faudit\u002Fcompliance","5.use-cases\u002F4.audit\u002F05.compliance",{"title":415,"path":416,"stem":417,"icon":84},"Recipes","\u002Fuse-cases\u002Faudit\u002Frecipes","5.use-cases\u002F4.audit\u002F06.recipes",{"title":356,"icon":112,"path":419,"stem":420,"children":421,"page":34},"\u002Fuse-cases\u002Ftelemetry","5.use-cases\u002F4.telemetry",[422,425,430,435],{"title":41,"path":423,"stem":424,"icon":44},"\u002Fuse-cases\u002Ftelemetry\u002Foverview","5.use-cases\u002F4.telemetry\u002F01.overview",{"title":426,"path":427,"stem":428,"icon":429},"Setup","\u002Fuse-cases\u002Ftelemetry\u002Fsetup","5.use-cases\u002F4.telemetry\u002F02.setup","i-lucide-wrench",{"title":431,"path":432,"stem":433,"icon":434},"Ingest","\u002Fuse-cases\u002Ftelemetry\u002Fingest","5.use-cases\u002F4.telemetry\u002F03.ingest","i-lucide-server",{"title":436,"path":437,"stem":438,"icon":84},"Reference","\u002Fuse-cases\u002Ftelemetry\u002Freference","5.use-cases\u002F4.telemetry\u002F04.reference",{"title":440,"path":441,"stem":442,"icon":443},"Enrichers","\u002Fuse-cases\u002Fenrichers","5.use-cases\u002F5.enrichers","i-lucide-sparkles",{"title":445,"path":446,"stem":447,"icon":448},"eve","\u002Fuse-cases\u002Feve","5.use-cases\u002F5.eve","i-custom-eve",{"title":450,"path":451,"stem":452,"icon":434},"Node.js request logging","\u002Fuse-cases\u002Fstructured-logging-nodejs","5.use-cases\u002F6.structured-logging-nodejs",{"title":454,"path":455,"stem":456,"children":457,"page":34},"Libraries","\u002Flibraries","6.libraries",[458,462,467,470,474,479,484],{"title":41,"path":459,"stem":460,"icon":461},"\u002Flibraries\u002Foverview","6.libraries\u002F0.overview","i-lucide-package",{"title":463,"path":464,"stem":465,"icon":466},"Emitting Events","\u002Flibraries\u002Femitting","6.libraries\u002F1.emitting","i-lucide-radio",{"title":56,"path":468,"stem":469,"icon":59},"\u002Flibraries\u002Ferrors","6.libraries\u002F2.errors",{"title":471,"path":472,"stem":473,"icon":132},"Errors Agents Can Act On","\u002Flibraries\u002Fagents","6.libraries\u002F3.agents",{"title":475,"path":476,"stem":477,"icon":478},"Exporting the Catalog","\u002Flibraries\u002Fexporting","6.libraries\u002F4.exporting","i-lucide-file-output",{"title":480,"path":481,"stem":482,"icon":483},"Migrating","\u002Flibraries\u002Fmigrating","6.libraries\u002F5.migrating","i-lucide-route",{"title":485,"path":486,"stem":487,"icon":488},"Testing","\u002Flibraries\u002Ftesting","6.libraries\u002F6.testing","i-lucide-flask-conical",{"title":490,"path":491,"stem":492,"children":493,"page":34},"Extend","\u002Fextend","7.extend",[494,498,503,508,512,517,521,525,529,533,538,543],{"title":41,"path":495,"stem":496,"icon":497},"\u002Fextend\u002Foverview","7.extend\u002F0.overview","i-lucide-blocks",{"title":499,"path":500,"stem":501,"icon":502},"Stream","\u002Fextend\u002Fstream","7.extend\u002F1.stream","i-lucide-radio-tower",{"title":504,"path":505,"stem":506,"icon":507},"Custom framework","\u002Fextend\u002Fcustom-framework","7.extend\u002F10.custom-framework","i-lucide-puzzle",{"title":509,"path":510,"stem":511,"icon":502},"Diagnostics channel","\u002Fextend\u002Fdiagnostics-channel","7.extend\u002F11.diagnostics-channel",{"title":513,"path":514,"stem":515,"icon":516},"FS reader","\u002Fextend\u002Ffs-reader","7.extend\u002F2.fs-reader","i-lucide-folder-search",{"title":415,"path":518,"stem":519,"icon":520},"\u002Fextend\u002Fconsumer-recipes","7.extend\u002F3.consumer-recipes","i-lucide-chef-hat",{"title":522,"path":523,"stem":524,"icon":497},"Plugins","\u002Fextend\u002Fplugins","7.extend\u002F4.plugins",{"title":526,"path":527,"stem":528,"icon":443},"Custom enrichers","\u002Fextend\u002Fcustom-enrichers","7.extend\u002F5.custom-enrichers",{"title":530,"path":531,"stem":532,"icon":69},"Tail sampling","\u002Fextend\u002Ftail-sampling","7.extend\u002F6.tail-sampling",{"title":534,"path":535,"stem":536,"icon":537},"Identity headers","\u002Fextend\u002Fidentity-headers","7.extend\u002F7.identity-headers","i-lucide-fingerprint",{"title":539,"path":540,"stem":541,"icon":542},"Custom drains","\u002Fextend\u002Fcustom-drains","7.extend\u002F8.custom-drains","i-lucide-share-2",{"title":544,"path":545,"stem":546,"icon":547},"Drain pipeline","\u002Fextend\u002Fdrain-pipeline","7.extend\u002F9.drain-pipeline","i-lucide-workflow",{"title":436,"path":549,"stem":550,"children":551,"page":34},"\u002Freference","8.reference",[552,556,561,564,569,573,578,582],{"title":41,"path":553,"stem":554,"icon":555},"\u002Freference\u002Foverview","8.reference\u002F0.overview","i-lucide-book-marked",{"title":557,"path":558,"stem":559,"icon":560},"Configuration","\u002Freference\u002Fconfiguration","8.reference\u002F1.configuration","i-lucide-settings",{"title":383,"path":562,"stem":563,"icon":112},"\u002Freference\u002Fperformance","8.reference\u002F2.performance",{"title":565,"path":566,"stem":567,"icon":568},"Vite Plugin","\u002Freference\u002Fvite-plugin","8.reference\u002F3.vite-plugin","i-custom-vite",{"title":570,"path":571,"stem":572,"icon":388},"Best Practices","\u002Freference\u002Fbest-practices","8.reference\u002F4.best-practices",{"title":574,"path":575,"stem":576,"icon":577},"vs Other Loggers","\u002Freference\u002Fvs-other-loggers","8.reference\u002F5.vs-other-loggers","i-lucide-scale",{"title":579,"path":580,"stem":581,"icon":443},"Agent Skills","\u002Freference\u002Fagent-skills","8.reference\u002F6.agent-skills",{"title":583,"path":584,"stem":585,"icon":586},"Cost","\u002Freference\u002Fcost","8.reference\u002F7.cost","i-lucide-receipt",{"title":588,"path":589,"stem":590,"children":591,"page":34},"Compare","\u002Fcompare","9.compare",[592,596,600,604,608],{"title":593,"path":594,"stem":595,"icon":577},"evlog vs Pino","\u002Fcompare\u002Fpino","9.compare\u002F1.pino",{"title":597,"path":598,"stem":599,"icon":204},"evlog vs OpenTelemetry","\u002Fcompare\u002Fopentelemetry","9.compare\u002F2.opentelemetry",{"title":601,"path":602,"stem":603,"icon":577},"evlog vs LogTape","\u002Fcompare\u002Flogtape","9.compare\u002F3.logtape",{"title":605,"path":606,"stem":607,"icon":577},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","9.compare\u002F4.winston",{"title":609,"path":610,"stem":611,"icon":577},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","9.compare\u002F5.consola",{"id":613,"title":614,"body":615,"description":1408,"extension":1409,"links":1410,"meta":1415,"navigation":1416,"path":584,"seo":1417,"stem":585,"__hash__":1418},"docs\u002F8.reference\u002F7.cost.md","Log cost",{"type":616,"value":617,"toc":1400},"minimark",[618,622,625,630,633,637,644,1162,1223,1254,1264,1268,1271,1320,1323,1326,1330,1333,1339,1342,1346,1353,1361,1372,1376,1396],[619,620,621],"p",{},"Log bills scale with what you send, and a logger that writes a line per step sends the same request context over and over. Every line carries its own level, timestamp, host, and request bindings. Four lines, four copies.",[619,623,624],{},"evlog emits one event per request instead, so that context is written once. This page measures the difference and lets you price it against your own traffic.",[626,627,629],"h2",{"id":628},"try-it-against-your-numbers","Try it against your numbers",[631,632],"log-cost-calculator",{},[626,634,636],{"id":635},"where-the-byte-counts-come-from","Where the byte counts come from",[619,638,639,640,643],{},"Both shapes are the checkout request documented on ",[641,642,383],"a",{"href":562},", serialized through the real libraries rather than estimated.",[645,646,647,915],"code-group",{},[648,649,655],"pre",{"className":650,"code":651,"filename":652,"language":653,"meta":654,"style":654},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const log = createLogger({ method: 'POST', path: '\u002Fapi\u002Fcheckout', requestId: 'req_abc' })\nlog.set({ user: { id: 'usr_123', plan: 'pro' } })\nlog.set({ cart: { items: 3, total: 9999 } })\nlog.set({ payment: { method: 'card', last4: '4242' } })\nlog.emit({ status: 200 })\n","evlog, 1 event of 322 B","typescript","",[656,657,658,737,793,838,889],"code",{"__ignoreMap":654},[659,660,663,667,671,675,679,682,685,689,692,695,699,702,705,708,710,712,715,717,719,722,724,726,729,731,734],"span",{"class":661,"line":662},"line",1,[659,664,666],{"class":665},"spNyl","const",[659,668,670],{"class":669},"sTEyZ"," log ",[659,672,674],{"class":673},"sMK4o","=",[659,676,678],{"class":677},"s2Zo4"," createLogger",[659,680,681],{"class":669},"(",[659,683,684],{"class":673},"{",[659,686,688],{"class":687},"swJcz"," method",[659,690,691],{"class":673},":",[659,693,694],{"class":673}," '",[659,696,698],{"class":697},"sfazB","POST",[659,700,701],{"class":673},"'",[659,703,704],{"class":673},",",[659,706,707],{"class":687}," path",[659,709,691],{"class":673},[659,711,694],{"class":673},[659,713,714],{"class":697},"\u002Fapi\u002Fcheckout",[659,716,701],{"class":673},[659,718,704],{"class":673},[659,720,721],{"class":687}," requestId",[659,723,691],{"class":673},[659,725,694],{"class":673},[659,727,728],{"class":697},"req_abc",[659,730,701],{"class":673},[659,732,733],{"class":673}," }",[659,735,736],{"class":669},")\n",[659,738,740,743,746,749,751,753,756,758,761,764,766,768,771,773,775,778,780,782,785,787,789,791],{"class":661,"line":739},2,[659,741,742],{"class":669},"log",[659,744,745],{"class":673},".",[659,747,748],{"class":677},"set",[659,750,681],{"class":669},[659,752,684],{"class":673},[659,754,755],{"class":687}," user",[659,757,691],{"class":673},[659,759,760],{"class":673}," {",[659,762,763],{"class":687}," id",[659,765,691],{"class":673},[659,767,694],{"class":673},[659,769,770],{"class":697},"usr_123",[659,772,701],{"class":673},[659,774,704],{"class":673},[659,776,777],{"class":687}," plan",[659,779,691],{"class":673},[659,781,694],{"class":673},[659,783,784],{"class":697},"pro",[659,786,701],{"class":673},[659,788,733],{"class":673},[659,790,733],{"class":673},[659,792,736],{"class":669},[659,794,796,798,800,802,804,806,809,811,813,816,818,822,824,827,829,832,834,836],{"class":661,"line":795},3,[659,797,742],{"class":669},[659,799,745],{"class":673},[659,801,748],{"class":677},[659,803,681],{"class":669},[659,805,684],{"class":673},[659,807,808],{"class":687}," cart",[659,810,691],{"class":673},[659,812,760],{"class":673},[659,814,815],{"class":687}," items",[659,817,691],{"class":673},[659,819,821],{"class":820},"sbssI"," 3",[659,823,704],{"class":673},[659,825,826],{"class":687}," total",[659,828,691],{"class":673},[659,830,831],{"class":820}," 9999",[659,833,733],{"class":673},[659,835,733],{"class":673},[659,837,736],{"class":669},[659,839,841,843,845,847,849,851,854,856,858,860,862,864,867,869,871,874,876,878,881,883,885,887],{"class":661,"line":840},4,[659,842,742],{"class":669},[659,844,745],{"class":673},[659,846,748],{"class":677},[659,848,681],{"class":669},[659,850,684],{"class":673},[659,852,853],{"class":687}," payment",[659,855,691],{"class":673},[659,857,760],{"class":673},[659,859,688],{"class":687},[659,861,691],{"class":673},[659,863,694],{"class":673},[659,865,866],{"class":697},"card",[659,868,701],{"class":673},[659,870,704],{"class":673},[659,872,873],{"class":687}," last4",[659,875,691],{"class":673},[659,877,694],{"class":673},[659,879,880],{"class":697},"4242",[659,882,701],{"class":673},[659,884,733],{"class":673},[659,886,733],{"class":673},[659,888,736],{"class":669},[659,890,892,894,896,899,901,903,906,908,911,913],{"class":661,"line":891},5,[659,893,742],{"class":669},[659,895,745],{"class":673},[659,897,898],{"class":677},"emit",[659,900,681],{"class":669},[659,902,684],{"class":673},[659,904,905],{"class":687}," status",[659,907,691],{"class":673},[659,909,910],{"class":820}," 200",[659,912,733],{"class":673},[659,914,736],{"class":669},[648,916,919],{"className":650,"code":917,"filename":918,"language":653,"meta":654,"style":654},"const child = pinoLogger.child({ method: 'POST', path: '\u002Fapi\u002Fcheckout', requestId: 'req_abc' })\nchild.info({ user: { id: 'usr_123', plan: 'pro' } }, 'user context')\nchild.info({ cart: { items: 3, total: 9999 } }, 'cart context')\nchild.info({ payment: { method: 'card', last4: '4242' } }, 'payment context')\nchild.info({ status: 200 }, 'request complete')\n","pino, 4 lines of 736 B",[656,920,921,980,1035,1080,1133],{"__ignoreMap":654},[659,922,923,925,928,930,933,935,938,940,942,944,946,948,950,952,954,956,958,960,962,964,966,968,970,972,974,976,978],{"class":661,"line":662},[659,924,666],{"class":665},[659,926,927],{"class":669}," child ",[659,929,674],{"class":673},[659,931,932],{"class":669}," pinoLogger",[659,934,745],{"class":673},[659,936,937],{"class":677},"child",[659,939,681],{"class":669},[659,941,684],{"class":673},[659,943,688],{"class":687},[659,945,691],{"class":673},[659,947,694],{"class":673},[659,949,698],{"class":697},[659,951,701],{"class":673},[659,953,704],{"class":673},[659,955,707],{"class":687},[659,957,691],{"class":673},[659,959,694],{"class":673},[659,961,714],{"class":697},[659,963,701],{"class":673},[659,965,704],{"class":673},[659,967,721],{"class":687},[659,969,691],{"class":673},[659,971,694],{"class":673},[659,973,728],{"class":697},[659,975,701],{"class":673},[659,977,733],{"class":673},[659,979,736],{"class":669},[659,981,982,984,986,989,991,993,995,997,999,1001,1003,1005,1007,1009,1011,1013,1015,1017,1019,1021,1023,1026,1028,1031,1033],{"class":661,"line":739},[659,983,937],{"class":669},[659,985,745],{"class":673},[659,987,988],{"class":677},"info",[659,990,681],{"class":669},[659,992,684],{"class":673},[659,994,755],{"class":687},[659,996,691],{"class":673},[659,998,760],{"class":673},[659,1000,763],{"class":687},[659,1002,691],{"class":673},[659,1004,694],{"class":673},[659,1006,770],{"class":697},[659,1008,701],{"class":673},[659,1010,704],{"class":673},[659,1012,777],{"class":687},[659,1014,691],{"class":673},[659,1016,694],{"class":673},[659,1018,784],{"class":697},[659,1020,701],{"class":673},[659,1022,733],{"class":673},[659,1024,1025],{"class":673}," },",[659,1027,694],{"class":673},[659,1029,1030],{"class":697},"user context",[659,1032,701],{"class":673},[659,1034,736],{"class":669},[659,1036,1037,1039,1041,1043,1045,1047,1049,1051,1053,1055,1057,1059,1061,1063,1065,1067,1069,1071,1073,1076,1078],{"class":661,"line":795},[659,1038,937],{"class":669},[659,1040,745],{"class":673},[659,1042,988],{"class":677},[659,1044,681],{"class":669},[659,1046,684],{"class":673},[659,1048,808],{"class":687},[659,1050,691],{"class":673},[659,1052,760],{"class":673},[659,1054,815],{"class":687},[659,1056,691],{"class":673},[659,1058,821],{"class":820},[659,1060,704],{"class":673},[659,1062,826],{"class":687},[659,1064,691],{"class":673},[659,1066,831],{"class":820},[659,1068,733],{"class":673},[659,1070,1025],{"class":673},[659,1072,694],{"class":673},[659,1074,1075],{"class":697},"cart context",[659,1077,701],{"class":673},[659,1079,736],{"class":669},[659,1081,1082,1084,1086,1088,1090,1092,1094,1096,1098,1100,1102,1104,1106,1108,1110,1112,1114,1116,1118,1120,1122,1124,1126,1129,1131],{"class":661,"line":840},[659,1083,937],{"class":669},[659,1085,745],{"class":673},[659,1087,988],{"class":677},[659,1089,681],{"class":669},[659,1091,684],{"class":673},[659,1093,853],{"class":687},[659,1095,691],{"class":673},[659,1097,760],{"class":673},[659,1099,688],{"class":687},[659,1101,691],{"class":673},[659,1103,694],{"class":673},[659,1105,866],{"class":697},[659,1107,701],{"class":673},[659,1109,704],{"class":673},[659,1111,873],{"class":687},[659,1113,691],{"class":673},[659,1115,694],{"class":673},[659,1117,880],{"class":697},[659,1119,701],{"class":673},[659,1121,733],{"class":673},[659,1123,1025],{"class":673},[659,1125,694],{"class":673},[659,1127,1128],{"class":697},"payment context",[659,1130,701],{"class":673},[659,1132,736],{"class":669},[659,1134,1135,1137,1139,1141,1143,1145,1147,1149,1151,1153,1155,1158,1160],{"class":661,"line":891},[659,1136,937],{"class":669},[659,1138,745],{"class":673},[659,1140,988],{"class":677},[659,1142,681],{"class":669},[659,1144,684],{"class":673},[659,1146,905],{"class":687},[659,1148,691],{"class":673},[659,1150,910],{"class":820},[659,1152,1025],{"class":673},[659,1154,694],{"class":673},[659,1156,1157],{"class":697},"request complete",[659,1159,701],{"class":673},[659,1161,736],{"class":669},[1163,1164,1165,1181],"table",{},[1166,1167,1168],"thead",{},[1169,1170,1171,1174,1178],"tr",{},[1172,1173],"th",{},[1172,1175,1177],{"align":1176},"right","Events",[1172,1179,1180],{"align":1176},"Bytes",[1182,1183,1184,1196,1207],"tbody",{},[1169,1185,1186,1190,1193],{},[1187,1188,1189],"td",{},"pino, 4 lines",[1187,1191,1192],{"align":1176},"4",[1187,1194,1195],{"align":1176},"736",[1169,1197,1198,1201,1204],{},[1187,1199,1200],{},"evlog, 1 event",[1187,1202,1203],{"align":1176},"1",[1187,1205,1206],{"align":1176},"322",[1169,1208,1209,1212,1218],{},[1187,1210,1211],{},"Difference",[1187,1213,1214],{"align":1176},[1215,1216,1217],"strong",{},"75% fewer",[1187,1219,1220],{"align":1176},[1215,1221,1222],{},"56% fewer",[619,1224,1225,1226,1229,1230,1229,1233,1229,1236,1229,1239,1229,1242,1245,1246,1249,1250,1253],{},"The two numbers differ because consolidation removes duplicated envelope, not payload. ",[656,1227,1228],{},"level",", ",[656,1231,1232],{},"time",[656,1234,1235],{},"pid",[656,1237,1238],{},"hostname",[656,1240,1241],{},"method",[656,1243,1244],{},"path",", and ",[656,1247,1248],{},"requestId"," are written four times by pino and once by evlog, and the four ",[656,1251,1252],{},"msg"," strings disappear entirely. The fields you actually set are written once either way.",[1255,1256,1259,1260,1263],"callout",{"color":1257,"icon":1258},"warning","i-lucide-alert-triangle","Your ratio is not this ratio. A handler that logs two lines saves less; one that repeats a large ",[656,1261,1262],{},"user"," object on every line saves more. The method transfers, the number does not.",[626,1265,1267],{"id":1266},"which-number-moves-your-bill","Which number moves your bill",[619,1269,1270],{},"Providers meter logs in one of two ways, and that decides which saving you actually collect.",[1163,1272,1273,1286],{},[1166,1274,1275],{},[1169,1276,1277,1280,1283],{},[1172,1278,1279],{},"Metered by",[1172,1281,1282],{},"Saving you collect",[1172,1284,1285],{},"Providers",[1182,1287,1288,1303],{},[1169,1289,1290,1293,1300],{},[1187,1291,1292],{},"Gigabytes ingested",[1187,1294,1295,1296,1299],{},"The ",[1215,1297,1298],{},"56%"," byte figure",[1187,1301,1302],{},"Grafana Cloud, Sentry, PostHog, Better Stack, Axiom",[1169,1304,1305,1312,1318],{},[1187,1306,1307,1308,1311],{},"Gigabytes ",[1215,1309,1310],{},"and"," indexed events",[1187,1313,1295,1314,1317],{},[1215,1315,1316],{},"75%"," event figure, on the line item that usually dominates",[1187,1319,181],{},[619,1321,1322],{},"Per-gigabyte billing is the common case, so most teams collect the byte saving. Datadog is the outlier worth checking: it bills ingestion per gigabyte and indexing per million events, and at production volumes the indexing line is the larger of the two, so the event count is what moves.",[619,1324,1325],{},"Rates were read on 14 August 2026 and are list prices, before free tiers, committed-use discounts, and retention add-ons. They are inputs in the calculator above for exactly that reason.",[626,1327,1329],{"id":1328},"sampling-moves-both-columns","Sampling moves both columns",[619,1331,1332],{},"The calculator applies sampling to both shapes, which is the only fair way to model it. Dropping events is not something evlog does and other loggers cannot: you can filter by level in any logger, or sample in the transport. Applying it to one side only would flatter evlog with a saving that is not evlog's. Pull the slider down and both bills fall together while the gap between them holds.",[619,1334,1335,1336,1338],{},"It is still the larger lever. Consolidation is bounded, because you cannot send fewer than one event per request. ",[641,1337,66],{"href":67}," is not: head sampling drops events by level at emit time, and tail sampling force-keeps the ones you would have wanted, so errors and slow requests survive a rule that discards the rest. Volume stops tracking traffic and starts tracking signal, which is the only version of this that keeps working as you grow.",[619,1340,1341],{},"What evlog changes is the unit sampling operates on. Dropping a line loses part of a request; dropping an event loses a whole one, and keeping an event keeps all of it.",[626,1343,1345],{"id":1344},"ask-it-from-your-editor","Ask it from your editor",[619,1347,1348,1349,1352],{},"The same calculation is an MCP tool on this site's server, so an assistant connected to ",[656,1350,1351],{},"https:\u002F\u002Fevlog.dev\u002Fmcp"," can answer it directly:",[648,1354,1359],{"className":1355,"code":1357,"language":1358},[1356],"language-text","estimate-log-cost({ requestsPerMonth: 10000000, linesPerRequest: 4, provider: \"datadog\" })\n","text",[656,1360,1357],{"__ignoreMap":654},[619,1362,1363,1364,1367,1368,1371],{},"It returns both shapes, the saving, and the basis it used: the measured byte counts, which rates it applied, and the date those rates were read. Pass ",[656,1365,1366],{},"perGb"," and ",[656,1369,1370],{},"perMillionIndexed"," to price a provider that is not in the list, or to correct one whose pricing has moved.",[626,1373,1375],{"id":1374},"next","Next",[1377,1378,1379,1385,1390],"ul",{},[1380,1381,1382,1384],"li",{},[641,1383,66],{"href":67},": the two tiers, and what each one costs you in visibility",[1380,1386,1387,1389],{},[641,1388,383],{"href":562},": the benchmarks these byte counts come from",[1380,1391,1392,1395],{},[641,1393,1394],{"href":153},"Drain adapters",": every destination, and how to change your mind later",[1397,1398,1399],"style",{},"html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}",{"title":654,"searchDepth":739,"depth":739,"links":1401},[1402,1403,1404,1405,1406,1407],{"id":628,"depth":739,"text":629},{"id":635,"depth":739,"text":636},{"id":1266,"depth":739,"text":1267},{"id":1328,"depth":739,"text":1329},{"id":1344,"depth":739,"text":1345},{"id":1374,"depth":739,"text":1375},"One request leaves one event instead of four lines: 56% fewer bytes, 75% fewer events. Which number moves your bill depends on your provider.","md",[1411,1414],{"label":383,"icon":112,"to":562,"color":1412,"variant":1413},"neutral","subtle",{"label":66,"icon":69,"to":67,"color":1412,"variant":1413},{},{"title":583,"icon":586},{"title":614,"description":1408},"EdRzz6H7qYHW5sOZZwDE7ZrU2iOsCuQgSdtNb3sBnVw",[1420,1422],{"title":579,"path":580,"stem":581,"description":1421,"icon":443,"children":-1},"AI-assisted code review and evlog adoption using Agent Skills. Let AI review your logging patterns and guide migration to wide events.",{"title":593,"path":594,"stem":595,"description":1423,"icon":577,"children":-1},"Compare request context, serializers, transports, and migration costs before moving a Pino application to evlog.",1789294021703]