Default to zstd compression for profile uploads on Node.js 24+

[szegedi]

What does this PR do?

Default to zstd compression for profile uploads on Node.js 24+

Motivation

We want to make zstd default. zstd is used by default by many other language profilers already and is well supported in the Datadog backend. We could default to ztsd on all supported Node.js versions as we ship a Rust zstd compressor for older Node.js versions, but on 24+ we use the built-in one that runs asynchronously on libuv worker threads, just as gzip does. This is a less disruptive choice than making it default on every version, as older versions would use the Rust zstd compressor that would run on the event loop thread.

Additional Notes

Jira: PROF-11927

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.55%. Comparing base (ecce729) to head (8c30f84).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7172   +/-   ##
=======================================
  Coverage   84.55%   84.55%           
=======================================
  Files         532      532           
  Lines       22641    22642    +1     
=======================================
+ Hits        19144    19145    +1     
  Misses       3497     3497           

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[github-actions]

Overall package size

Self size: 4.38 MB
Deduped: 5.21 MB
No deduping: 5.21 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | import-in-the-middle | 2.0.0 | 68.46 kB | 797.03 kB | | dc-polyfill | 0.1.10 | 26.73 kB | 26.73 kB |

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

[pr-commenter]

Benchmarks

Benchmark execution time: 2026-01-09 13:26:14

Comparing candidate commit 8c30f84 in PR branch szegedi/zstd-default with baseline commit ecce729 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 290 metrics, 30 unstable metrics.