fix(aws-lambda): reduced cold start duration#2321
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packages/core/src/tracing/opentelemetry-instrumentations/index.js
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| const { AsyncHooksContextManager } = require('@opentelemetry/context-async-hooks'); | ||
| const { W3CTraceContextPropagator, hrTimeDuration, hrTimeToMilliseconds } = require('@opentelemetry/core'); | ||
| const api = require('@opentelemetry/api'); | ||
| const { BasicTracerProvider } = require('@opentelemetry/sdk-trace-base'); |
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tracing/index.js
exports.preinit
otelIntegration.preInit()
wrap.js
exports.preInit(config)
if (config.preloadOpentelemetry)
AsyncHooksContextManager = require(@opentelemetry/context-async-hooks)
...
instrumentations.forEach
instrumentation.preInit()
exports.init
....
AsyncHooksContextManager = AsyncHooksContextManager || require(@opentelemetry/context-async-hooks)
fs.js
exports.preInit
fs = require(@opentelemetry/instrumentation-fs)
The goal should be that the instrumentation owns the name. IMO the instrumentation.js file is not needed rn.
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fix(aws-lambda): reduced cold start duration
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| Object.keys(instrumentations).forEach(k => { | ||
| const value = instrumentations[k]; | ||
| const instrumentation = require(`./${value.name}`); | ||
| instrumentation.init({ cls, api: api }); | ||
| value.module = instrumentation; | ||
| }); |
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Can't we reuse initInstrumentations?
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This PR avoids lazy loading OpenTelemetry instrumentations in the AWS Lambda environment.
In AWS Lambda, lazy loading causes OpenTelemetry instrumentations to be initialized during the first invocation, which adds 1900–2100 ms of latency to cold starts and increases billable execution time.
To address this, instrumentations are preloaded during the Lambda initialization step instead of being loaded lazily at runtime.
With this change, cold start overhead is significantly reduced, bringing initialization time down from approximately 1900 ms to 500 ms, resulting in faster executions and lower costs in AWS Lambda environments.
Ref: https://ibm.ent.box.com/notes/2107188531951
https://jsw.ibm.com/browse/INSTA-74767