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#!/usr/bin/env bun

import { readFileSync } from "fs";

function parseLogFile(filename) {

const testDetails = new Map(); // Track individual attempts and total for each test

let currentTest = null;

let startTime = null;

// Pattern to match test group start: --- [90m[N/TOTAL][0m test/path

// Note: there are escape sequences before _bk

const startPattern = /_bk;t=(\d+).*?--- .*?\[90m\[(\d+)\/(\d+)\].*?\[0m (.+)/;

const content = readFileSync(filename, "utf-8");

const lines = content.split("\n");

for (const line of lines) {

const match = line.match(startPattern);

if (match) {

// If we have a previous test, calculate its duration

if (currentTest && startTime) {

const endTime = parseInt(match[1]);

const duration = endTime - startTime;

// Extract attempt info - match the actual ANSI pattern

const attemptMatch = currentTest.match(/\s+\x1b\[90m\[attempt #(\d+)\]\x1b\[0m$/);

const cleanName = currentTest.replace(/\s+\x1b\[90m\[attempt #\d+\]\x1b\[0m$/, "").trim();

const attemptNum = attemptMatch ? parseInt(attemptMatch[1]) : 1;

if (!testDetails.has(cleanName)) {

testDetails.set(cleanName, { total: 0, attempts: [] });

}

const testInfo = testDetails.get(cleanName);

testInfo.total += duration;

testInfo.attempts.push({ attempt: attemptNum, duration });

}

// Start new test

startTime = parseInt(match[1]);

currentTest = match[4].trim();

}

// Convert to array and sort by total duration

const testGroups = Array.from(testDetails.entries())

.map(([name, info]) => ({

name,

totalDuration: info.total,

attempts: info.attempts.sort((a, b) => a.attempt - b.attempt),

}))

.sort((a, b) => b.totalDuration - a.totalDuration);

return testGroups;

}

function formatAttempts(attempts) {

if (attempts.length <= 1) return "";

const attemptStrings = attempts.map(

({ attempt, duration }) => `${(duration / 1000).toFixed(1)}s attempt #${attempt}`,

);

return ` [${attemptStrings.join(", ")}]`;

}

if (process.argv.length !== 3) {

console.log("Usage: bun parse_test_logs.js <log_file>");

process.exit(1);

}

const filename = process.argv[2];

const testGroups = parseLogFile(filename);

const totalTime = testGroups.reduce((sum, group) => sum + group.totalDuration, 0) / 1000;

const avgTime = testGroups.length > 0 ? totalTime / testGroups.length : 0;

console.log(

`## Slowest Tests Analysis - ${testGroups.length} tests (${totalTime.toFixed(1)}s total, ${avgTime.toFixed(2)}s avg)`,

);

console.log("");

// Top 10 summary

console.log("**Top 10 slowest tests:**");

for (let i = 0; i < Math.min(10, testGroups.length); i++) {

const { name, totalDuration, attempts } = testGroups[i];

const durationSec = totalDuration / 1000;

const testName = name.replace("test/", "").replace(".test.ts", "").replace(".test.js", "");

const attemptInfo = formatAttempts(attempts);

console.log(`- **${durationSec.toFixed(1)}s** ${testName}${attemptInfo}`);

}

console.log("");

// Filter tests > 1 second

const slowTests = testGroups.filter(test => test.totalDuration > 1000);

console.log("```");

console.log(`All tests > 1s (${slowTests.length} tests):`);

for (let i = 0; i < slowTests.length; i++) {

const { name, totalDuration, attempts } = slowTests[i];

const durationSec = totalDuration / 1000;

const attemptInfo = formatAttempts(attempts);

console.log(`${(i + 1).toString().padStart(3)}. ${durationSec.toFixed(2).padStart(7)}s ${name}${attemptInfo}`);

}

console.log("```");

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