[test optimization] [wip] Improve vitest performance

[juan-fernandez]

What does this PR do?

Motivation

Plugin Checklist

• Unit tests.
• Integration tests.
• Benchmarks.
• TypeScript definitions.
• TypeScript tests.
• API documentation.
• CI jobs/workflows.

Additional Notes

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-06-09 15:04:02

Comparing candidate commit 9e3f09f in PR branch juan-fernandez/fix-vitest-performance with baseline commit 3c8fe63 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 1157 metrics, 45 unstable metrics.

[github-actions]

Overall package size

Self size: 9.62 MB
Deduped: 104.56 MB
No deduping: 105.08 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | @datadog/libdatadog | 0.6.0 | 30.47 MB | 30.47 MB | | @datadog/native-appsec | 8.5.2 | 19.33 MB | 19.34 MB | | @datadog/pprof | 5.8.0 | 12.55 MB | 12.92 MB | | @datadog/native-iast-taint-tracking | 4.0.0 | 11.72 MB | 11.73 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 27.27273% with 8 lines in your changes missing coverage. Please review.

Project coverage is 80.69%. Comparing base (3c8fe63) to head (9e3f09f).

Files with missing lines	Patch %	Lines
.../src/ci-visibility/exporters/test-worker/writer.js	40.00%	3 Missing ⚠️
...ages/datadog-instrumentations/src/helpers/hooks.js	0.00%	2 Missing ⚠️
...e/src/ci-visibility/exporters/test-worker/index.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   80.71%   80.69%   -0.03%     
==========================================
  Files         464      464              
  Lines       19875    19883       +8     
==========================================
+ Hits        16043    16045       +2     
- Misses       3832     3838       +6     

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[datadog-datadog-prod-us1]

Datadog Report

Branch report: juan-fernandez/fix-vitest-performance
Commit report: 224949c
Test service: dd-trace-js-integration-tests

❌ 2 Failed (0 Known Flaky), 1256 Passed, 0 Skipped, 18m 0.38s Total Time

❌ Failed Tests (2)

• vitest@latest dynamic instrumentation runs retries with dynamic instrumentation - integration-tests/vitest/vitest.spec.js - Details

  Expand for error

   Cannot read properties of undefined (reading 'logMessage')
  

• vitest@latest dynamic instrumentation runs retries with dynamic instrumentation - integration-tests/vitest/vitest.spec.js - Details

  Expand for error

   Cannot read properties of undefined (reading 'logMessage')