[test optimization] Improve vitest performance

[juan-fernandez]

What does this PR do?

Instead of each of the workers in vitest reporting to datadog themselves, we make them report to the main process, which is in charge of doing the reporting.

⚠️ Do not merge yet: we are still doing some external e2e testing

Motivation

Make vitest faster

Plugin Checklist

• Unit tests.

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-06-26 14:48:19

Comparing candidate commit 92c2083 in PR branch juan-fernandez/fix-vitest-performance with baseline commit ee3f034 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 1271 metrics, 52 unstable metrics.

[github-actions]

Overall package size

Self size: 9.61 MB
Deduped: 106.12 MB
No deduping: 106.64 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | @datadog/libdatadog | 0.7.0 | 35.02 MB | 35.02 MB | | @datadog/native-appsec | 8.5.2 | 19.33 MB | 19.34 MB | | @datadog/native-iast-taint-tracking | 4.0.0 | 11.72 MB | 11.73 MB | | @datadog/pprof | 5.8.2 | 9.56 MB | 9.93 MB | | @opentelemetry/core | 1.30.1 | 908.66 kB | 7.16 MB | | protobufjs | 7.5.3 | 2.95 MB | 5.6 MB | | @datadog/wasm-js-rewriter | 4.0.1 | 2.85 MB | 3.58 MB | | @datadog/native-metrics | 3.1.1 | 1.02 MB | 1.43 MB | | @opentelemetry/api | 1.8.0 | 1.21 MB | 1.21 MB | | import-in-the-middle | 1.14.0 | 120.58 kB | 841.68 kB | | source-map | 0.7.4 | 226 kB | 226 kB | | opentracing | 0.14.7 | 194.81 kB | 194.81 kB | | lru-cache | 7.18.3 | 133.92 kB | 133.92 kB | | pprof-format | 2.1.0 | 111.69 kB | 111.69 kB | | @datadog/sketches-js | 2.1.1 | 109.9 kB | 109.9 kB | | lodash.sortby | 4.7.0 | 75.76 kB | 75.76 kB | | ignore | 5.3.2 | 53.63 kB | 53.63 kB | | istanbul-lib-coverage | 3.2.2 | 34.37 kB | 34.37 kB | | rfdc | 1.4.1 | 27.15 kB | 27.15 kB | | @isaacs/ttlcache | 1.4.1 | 25.2 kB | 25.2 kB | | dc-polyfill | 0.1.9 | 25.11 kB | 25.11 kB | | tlhunter-sorted-set | 0.1.0 | 24.94 kB | 24.94 kB | | shell-quote | 1.8.2 | 23.54 kB | 23.54 kB | | limiter | 1.1.5 | 23.17 kB | 23.17 kB | | retry | 0.13.1 | 18.85 kB | 18.85 kB | | semifies | 1.0.0 | 15.84 kB | 15.84 kB | | jest-docblock | 29.7.0 | 8.99 kB | 12.76 kB | | crypto-randomuuid | 1.0.0 | 11.18 kB | 11.18 kB | | ttl-set | 1.0.0 | 4.61 kB | 9.69 kB | | mutexify | 1.4.0 | 5.71 kB | 8.74 kB | | path-to-regexp | 0.1.12 | 6.6 kB | 6.6 kB | | koalas | 1.0.2 | 6.47 kB | 6.47 kB | | module-details-from-path | 1.0.4 | 3.96 kB | 3.96 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 6 lines in your changes missing coverage. Please review.

Project coverage is 79.50%. Comparing base (ee3f034) to head (92c2083).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
...e/src/ci-visibility/exporters/test-worker/index.js	25.00%	3 Missing ⚠️
...ages/datadog-instrumentations/src/helpers/hooks.js	0.00%	2 Missing ⚠️
packages/dd-trace/src/plugins/index.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5803      +/-   ##
==========================================
- Coverage   79.53%   79.50%   -0.03%     
==========================================
  Files         477      476       -1     
  Lines       20390    20314      -76     
==========================================
- Hits        16217    16151      -66     
+ Misses       4173     4163      -10     

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[datadog-datadog-prod-us1]

Datadog Report

Branch report: juan-fernandez/fix-vitest-performance
Commit report: 261192c
Test service: dd-trace-js-integration-tests

✅ 0 Failed, 1262 Passed, 0 Skipped, 20m 46.47s Total Time