fix(ext/webgpu): Create GPUQuerySet converter before usage

[reczkok]

Hi, while trying to do performance tests for TypeGPU we encountered a problem when using Timestamp Queries.

Converter for GPUComputePassTimestampWrites uses converter for GPUQuerySet before it is defined making it impossible to use. This PR simply reorders converter creation to resolve this issue. Logging the GPUQuerySet still fails (as mentioned in #26769) but it is now usable inside pass descriptors and works when used.

[CLAassistant]

All committers have signed the CLA.

[jowens]

@reczkok With this fix, you are getting valid timestamps in a WebGPU program? With your fix, I am not, but I'm on a M3 MacBook Air, and there are other issues (generally) with timestamps on M3.

[jowens]

Repro here: https://github.com/jowens/webgpu-sandbox/blob/main/deno-standalone-timing-mre.mjs

% ~/Documents/src/deno/target/release/deno run deno-standalone-timing-mre.mjs
workgroup count: 262144
      workgroup size: 64
      maxComputeWGPerDim: 65535
      dispatchGeometry: 32768,8
Memdest size: 16777216 | No errors!
Timing raw data: 0n 0n 0
Timing result: 0 ns; transferred 134217728 bytes; bandwidth = Infinity GB/s

% ~/Documents/src/deno/target/release/deno --version
deno 2.0.6 (stable, release, aarch64-apple-darwin)
v8 13.0.245.12-rusty
typescript 5.6.2

(built today from top-of-tree)

[reczkok]

Hi @jowens! I just tested the code in your repo and it seems to work just fine for me.

% ../DenoFork/deno/target/debug/deno run main.ts  
workgroup count: 262144
        workgroup size: 64
        maxComputeWGPerDim: 65535
        dispatchGeometry: 32768,8
Memdest size: 16777216 | No errors!
Timing raw data: 5747615510208n 5747616430958n 920750
Timing result: 920750 ns; transferred 134217728 bytes; bandwidth = 145.77000054303556 GB/s

I'm on a MacBook Pro M1

% ../DenoFork/deno/target/debug/deno --version  
deno 2.0.6 (stable, debug, aarch64-apple-darwin)
v8 13.0.245.12-rusty
typescript 5.6.2

I'm still testing from my local fork but the changes from this PR should be the only ones there.

[jowens]

OK! Good chance I'm being bit by https://issues.chromium.org/issues/372698905 then.

DELIGHTED that query sets work in Deno here!