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Extra traces inside of runJS to find out where time is being used.

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Sam Rose 2024-01-08 09:49:32 +00:00
parent 47d973c75a
commit 6c20799b92
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1 changed files with 38 additions and 26 deletions
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64
packages/server/src/jsRunner.ts
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@ -12,36 +12,48 @@ export function init() {
const perRequestLimit = env.JS_PER_REQUEST_TIME_LIMIT_MS
let track: TrackerFn = f => f()
if (perRequestLimit) {
const bbCtx = context.getCurrentContext()
if (bbCtx) {
if (!bbCtx.jsExecutionTracker) {
bbCtx.jsExecutionTracker =
timers.ExecutionTimeTracker.withLimit(perRequestLimit)
tracer.trace("runJS.setupTracker", {}, span => {
const bbCtx = context.getCurrentContext()
if (bbCtx) {
if (!bbCtx.jsExecutionTracker) {
bbCtx.jsExecutionTracker =
timers.ExecutionTimeTracker.withLimit(perRequestLimit)
}
span?.addTags({
js: {
limitMS: bbCtx.jsExecutionTracker.limitMs,
elapsedMS: bbCtx.jsExecutionTracker.elapsedMS,
},
})
// We call checkLimit() here to prevent paying the cost of creating
// a new VM context below when we don't need to.
bbCtx.jsExecutionTracker.checkLimit()
track = bbCtx.jsExecutionTracker.track.bind(
bbCtx.jsExecutionTracker
)
}
span?.addTags({
js: {
limitMS: bbCtx.jsExecutionTracker.limitMs,
elapsedMS: bbCtx.jsExecutionTracker.elapsedMS,
},
})
// We call checkLimit() here to prevent paying the cost of creating
// a new VM context below when we don't need to.
bbCtx.jsExecutionTracker.checkLimit()
track = bbCtx.jsExecutionTracker.track.bind(bbCtx.jsExecutionTracker)
}
})
}
ctx = {
...ctx,
alert: undefined,
setInterval: undefined,
setTimeout: undefined,
}
vm.createContext(ctx)
ctx = tracer.trace("runJS.ctxClone", {}, span => {
return {
...ctx,
alert: undefined,
setInterval: undefined,
setTimeout: undefined,
}
})
tracer.trace("runJS.vm.createContext", {}, span => {
vm.createContext(ctx)
})
return track(() =>
vm.runInNewContext(js, ctx, {
timeout: env.JS_PER_EXECUTION_TIME_LIMIT_MS,
})
tracer.trace("runJS.vm.runInNewContext", {}, span =>
vm.runInNewContext(js, ctx, {
timeout: env.JS_PER_EXECUTION_TIME_LIMIT_MS,
})
)
)
})
})