kacerr/http-latency-prober
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feat(go): step 2 — per-phase request breakdown via httptrace

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Instruments HTTP requests with net/http/httptrace.ClientTrace to capture
timestamps for DNS, TCP connect, TLS handshake, TTFB, and body transfer.
TLS row is omitted automatically for plain http:// URLs. Output is an
aligned text table with a separator before the Total row.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jan Novak
2026-07-01 00:23:36 +02:00
parent a588eb3b0e
commit 0ecfb9bb1a
5 changed files with 184 additions and 10 deletions
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README.md
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@@ -91,7 +91,7 @@ https://example.com (5 samples)
|------|---------|--------|
| 0 | Project scaffold — directory structure, `go.mod`, minimal binary | ✅ Done |
| 1 | Simple total latency — single URL, wall-clock time | ✅ Done |
| 2 | Per-phase breakdown — DNS, TCP, TLS, TTFB, transfer (`net/http/httptrace`) | ⬜ Pending |
| 2 | Per-phase breakdown — DNS, TCP, TLS, TTFB, transfer (`net/http/httptrace`) | ✅ Done |
| 3 | Multiple URLs + `--count`/`-n` — min/avg/max aggregates | ⬜ Pending |
| 4 | `--json` output flag | ⬜ Pending |