Measurement on cpu time

Is there any way to measure cpu time? Since Date.now() doesn't work as it mentioned in this wiki https://developers.cloudflare.com/workers/runtime-apis/performance
My worker is run heavily on cpu with wasm like processing image , measure only database fetches or api fetches is not enough for request tracing, didn't give me enough info to visual the request timeline

Cloudflare Docs

Performance and timers · Cloudflare Workers docs

Measure timing, performance, and timing of subrequests and other operations.

Aan Is there any way to measure cpu time? Since Date.now() doesn't work as it mentio...

Chaika•4/30/24, 12:47 PM

In local development, however, timers will increment regardless of whether I/O happens or not. This means that if you need to measure timing of a piece of code that is CPU intensive, that does not involve I/O, you can run your Worker locally, via Wrangler, which uses the open-source Workers runtime, workerd
— the same runtime that your Worker runs in when deployed to Cloudflare.

Chaika•4/30/24, 12:48 PM

best you can do right now for exact timing of specific functions

anOP•5/1/24, 6:53 PM

best you can do right now for exact timing of specific functions

@Chaika what does specific functions mean, does it mean worker or a function like abc()
if abc(), is there any doc for it?

Aan > best you can do right now for exact timing of specific functions @Chaika what ...

Chaika•5/1/24, 6:54 PM

I mean that in local, you can use Date.now and Performance. now as normal, and they will function normally

Chaika•5/1/24, 6:54 PM

it's only on deployed workers that they are frozen except for i/o

Chaika•5/1/24, 6:55 PM

and local uses workerd/the same runtime as deployed (although of course different cpu and such), you can still get rough numbers "ok this is super inefficient method", etc

CChaika and local uses workerd/the same runtime as deployed (although of course differen...

anOP•5/1/24, 7:26 PM

ah I'm using it to observability and building dashboard to see numbers. it's so bad when we can't take that number
but I understand your point, thank for answer, hope we can measure it one day

anOP•5/1/24, 8:31 PM

@Chaika can https://developers.cloudflare.com/workers/runtime-apis/rpc/ work for this, like measure rpc instead

Cloudflare Docs

Remote-procedure call (RPC) · Cloudflare Workers docs

The built-in, JavaScript-native RPC system built into Workers and Durable Objects.

anOP•5/2/24, 3:25 PM

just tested and it seem like pretty the same as before, I think normal fetch would be fine, will update soon

Measurement on cpu time

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