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ci: report the slowest Go packages and tests in every job summary #802

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Merged
omartelo merged 2 commits into from
Oct 17, 2026
Merged

ci: report the slowest Go packages and tests in every job summary #802

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6dfb8b0
ci: report the slowest Go packages and tests, and turn off Defender s…
omartelo Oct 17, 2026
4663343
ci: drop the Defender step, it bought nothing measurable
omartelo Oct 17, 2026
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23 changes: 23 additions & 0 deletions .github/scripts/go-test-summary.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,10 @@ label="${1:+ — $1}"
json="$(mktemp)"
cover="$(mktemp)"

started=$SECONDS
go test -json -coverprofile="$cover" ./... >"$json"
code=$?
wall=$((SECONDS - started))

read -r pass fail skip < <(jq -rs '
map(select(.Test != null and (.Action == "pass" or .Action == "fail" or .Action == "skip")))
Expand Down Expand Up @@ -42,6 +44,7 @@ grep -v '^github.com/omartelo/lich/[^/]*\.go:' "$cover" >"$cover.gated"
total="$(go tool cover -func="$cover.gated" | awk '/^total:/ {print $3}')"

min=80
slowest=15
if ! awk -v t="${total%\%}" -v m="$min" 'BEGIN { exit !(t != "" && t + 0 >= m) }'; then
echo "::error::backend coverage ${total:-n/a} is below the ${min}% bar (CLAUDE.md invariant 1)"
[ "$code" = "0" ] && code=1
Expand All @@ -62,6 +65,26 @@ summary="${GITHUB_STEP_SUMMARY:-/dev/stdout}"
echo ""
echo "</details>"
fi
# Elapsed is run time only: the gap between the wall time and the slowest
# package is compiling and linking the test binaries, which is where one OS
# can lose minutes to another without any test getting slower.
echo "<details><summary>Timings: ${wall}s wall</summary>"
echo ""
echo "| Package | Seconds |"
echo "|:--|--:|"
jq -rs --argjson n "$slowest" '
map(select(.Test == null and .Elapsed != null and (.Action == "pass" or .Action == "fail")))
| sort_by(-.Elapsed) | .[:$n][] | "| `\(.Package)` | \(.Elapsed) |"
' "$json"
echo ""
echo "| Test | Seconds |"
echo "|:--|--:|"
jq -rs --argjson n "$slowest" '
map(select(.Test != null and (.Test | contains("/") | not) and .Elapsed != null and (.Action == "pass" or .Action == "fail")))
| sort_by(-.Elapsed) | .[:$n][] | "| `\(.Package | sub(".*/"; "")).\(.Test)` | \(.Elapsed) |"
' "$json"
echo ""
echo "</details>"
} >>"$summary"

exit "$code"
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