lazy load telemetry only when needed

[rochdev]

What does this PR do?

Lazy load telemetry only when needed.

Motivation

Right now when telemetry is disabled, the code is still loaded which impacts startup time.

Additional Notes

For now I only handled this for tracing specifically. There are other places that use telemetry internals directly, for example AppSec, but this will be handled in a second pass later on as right now we are focusing on the default.

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 18 lines in your changes missing coverage. Please review.

Project coverage is 80.36%. Comparing base (8e8898d) to head (4572fbf).

Files with missing lines	Patch %	Lines
packages/dd-trace/src/telemetry/telemetry.js	92.77%	12 Missing ⚠️
packages/datadog-plugin-dd-trace-api/src/index.js	40.00%	3 Missing ⚠️
packages/dd-trace/src/opentracing/span.js	60.00%	2 Missing ⚠️
packages/dd-trace/src/config.js	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5255      +/-   ##
==========================================
- Coverage   81.24%   80.36%   -0.88%     
==========================================
  Files         487      465      -22     
  Lines       21703    20993     -710     
==========================================
- Hits        17633    16872     -761     
- Misses       4070     4121      +51     

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[github-actions]

Overall package size

Self size: 8.68 MB
Deduped: 94.88 MB
No deduping: 95.4 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | @datadog/libdatadog | 0.4.0 | 29.44 MB | 29.44 MB | | @datadog/native-appsec | 8.4.0 | 19.25 MB | 19.26 MB | | @datadog/native-iast-taint-tracking | 3.3.0 | 13.77 MB | 13.78 MB | | @datadog/pprof | 5.5.1 | 9.79 MB | 10.17 MB | | protobufjs | 7.2.5 | 2.77 MB | 5.16 MB | | @datadog/native-iast-rewriter | 2.8.0 | 2.6 MB | 2.74 MB | | @opentelemetry/core | 1.14.0 | 872.87 kB | 1.47 MB | | @datadog/native-metrics | 3.1.0 | 1.06 MB | 1.46 MB | | @opentelemetry/api | 1.8.0 | 1.21 MB | 1.21 MB | | import-in-the-middle | 1.11.2 | 112.74 kB | 835.4 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 | 2.1.0 | 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 | | shell-quote | 1.8.1 | 44.96 kB | 44.96 kB | | istanbul-lib-coverage | 3.2.0 | 29.34 kB | 29.34 kB | | rfdc | 1.3.1 | 25.21 kB | 25.21 kB | | @isaacs/ttlcache | 1.4.1 | 25.2 kB | 25.2 kB | | tlhunter-sorted-set | 0.1.0 | 24.94 kB | 24.94 kB | | limiter | 1.1.5 | 23.17 kB | 23.17 kB | | dc-polyfill | 0.1.4 | 23.1 kB | 23.1 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 | | 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 | 1.0.3 | 4.47 kB | 4.47 kB |

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

[datadog-datadog-prod-us1]

Datadog Report

Branch report: lazy-telemetry
Commit report: d339b63
Test service: dd-trace-js-integration-tests

✅ 0 Failed, 627 Passed, 0 Skipped, 11m 41.9s Total Time

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-02-13 00:44:51

Comparing candidate commit 4572fbf in PR branch lazy-telemetry with baseline commit 8e8898d in branch master.

Found 14 performance improvements and 0 performance regressions! Performance is the same for 889 metrics, 30 unstable metrics.

scenario:debugger-enabled-but-breakpoint-not-hit-20

• 🟩 instructions [-86.1M instructions; -82.8M instructions] or [-5.892%; -5.661%]

scenario:debugger-enabled-but-breakpoint-not-hit-22

• 🟩 instructions [-78.6M instructions; -75.1M instructions] or [-5.535%; -5.291%]

scenario:debugger-line-probe-with-snapshot-minimal-20

• 🟩 instructions [-79.9M instructions; -75.9M instructions] or [-7.131%; -6.773%]

scenario:debugger-line-probe-with-snapshot-minimal-22

• 🟩 instructions [-80.0M instructions; -76.2M instructions] or [-7.401%; -7.050%]

scenario:debugger-line-probe-without-snapshot-20

• 🟩 instructions [-87.7M instructions; -82.5M instructions] or [-6.358%; -5.987%]

scenario:debugger-line-probe-without-snapshot-22

• 🟩 instructions [-77.1M instructions; -75.0M instructions] or [-5.731%; -5.579%]

scenario:log-skip-log-22

• 🟩 cpu_user_time [-25.400ms; -19.857ms] or [-8.403%; -6.569%]
• 🟩 execution_time [-25.764ms; -21.853ms] or [-7.402%; -6.278%]

scenario:log-with-debug-22

• 🟩 cpu_user_time [-25.893ms; -20.895ms] or [-8.622%; -6.958%]
• 🟩 execution_time [-27.202ms; -25.018ms] or [-7.841%; -7.212%]

scenario:log-with-error-22

• 🟩 cpu_user_time [-27.487ms; -22.666ms] or [-9.220%; -7.603%]
• 🟩 execution_time [-26.278ms; -24.720ms] or [-7.673%; -7.217%]

scenario:log-without-log-22

• 🟩 cpu_user_time [-27.666ms; -22.733ms] or [-9.929%; -8.159%]
• 🟩 execution_time [-26.381ms; -25.289ms] or [-8.128%; -7.792%]