test: verify octocov reports a runtime regression

[toiroakr]

Summary

Disposable verification PR for #881. Do not merge or release.

• Add a deliberate 0.1 ms synchronous delay to each argument parse, producing a real runtime regression while preserving parsed results.
• Compare unchanged benchmark workloads against the main report from commit 39f5c42 to verify that octocov publishes timing differences in this PR and the Actions summary.
• Close this draft after capturing the report.

Build, lint, formatting, type checks, and dependency checks pass. All 564 test files pass (13,271 passed, 639 skipped), with no type errors. Self-review correctly identified the deliberate delay as unsuitable for release; this change exists only in this disposable branch.

Code Metrics Report

	main (39f5c42)	#882 (773c70e)	+/-
Coverage	93.3%	93.3%	+0.0%
Test Execution Time	41s	30s	-11s

Details

  |                     | main (39f5c42) | #882 (773c70e) |  +/-  |
  |---------------------|----------------|----------------|-------|
+ | Coverage            |          93.3% |          93.3% | +0.0% |
  |   Files             |            141 |            141 |     0 |
  |   Lines             |           8933 |           8934 |    +1 |
+ |   Covered           |           8340 |           8341 |    +1 |
+ | Test Execution Time |            41s |            30s |  -11s |

Code coverage of files in pull request scope (93.4% → 93.4%, patch 100.0%)

Files	Coverage	+/-	Patch Coverage	Status
packages/core/src/parser/argv-parser.ts	93.4%	+0.0%	100.0%	modified

Runtime performance (lower is better)

	main (39f5c42)	#882 (773c70e)	+/-
Argument parsing	1153.5 ns/op	171833.1 ns/op	+170679.6 ns/op
Zod schema extraction (warm cache)	19.2 ns/op	19.2 ns/op	-0.1 ns/op
Subcommand execution (Zod)	41800.6 ns/op	255741.3 ns/op	+213940.6 ns/op
Help generation	12289.7 ns/op	12208.2 ns/op	-81.5 ns/op
bash completion (static)	63073.8 ns/op	59328.1 ns/op	-3745.7 ns/op
bash completion (dispatcher)	26740.7 ns/op	26402.3 ns/op	-338.5 ns/op
zsh completion (static)	62760.4 ns/op	60389.2 ns/op	-2371.2 ns/op
zsh completion (dispatcher)	27958.0 ns/op	28067.2 ns/op	+109.1 ns/op
fish completion (static)	52474.1 ns/op	52749.5 ns/op	+275.3 ns/op
fish completion (dispatcher)	28693.7 ns/op	28853.7 ns/op	+159.9 ns/op

Metadata

	main (39f5c42)	#882 (773c70e)
Node.js	v24.21.0	v24.21.0
Platform	linux/x64	linux/x64
sampling	300 ms warmup; median of 7 x 250 ms samples; 100 ops/batch	300 ms warmup; median of 7 x 250 ms samples; 100 ops/batch

---

Reported by octocov

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commit: 2c7fe96