anonymous_github/backend/scripts/render-slower-path-optimization.cjs

const fs=require('fs'),assert=require('assert/strict');
const before=JSON.parse(fs.readFileSync('backend/reports/repository-runtime-comparison.json'));
const after=JSON.parse(fs.readFileSync('backend/reports/repository-runtime-comparison-after.json'));
const median=a=>{a=[...a].sort((a,b)=>a-b);return (a[Math.floor((a.length-1)/2)]+a[Math.floor(a.length/2)])/2};
const summary=after.results[0].results.map(x=>{
 const row={name:x.name};
 for(const [label,report,runtime] of [['ts',after,'node'],['goBefore',before,'go'],['goAfter',after,'go']]){
  const runs=report.results.filter(x=>x.runtime===runtime).map(run=>run.results.find(y=>y.name===row.name));
  assert(runs.every(x=>x.output.status===200));
  row[label]={output:runs[0].output,coldMs:median(runs.map(x=>x.cold.ms)),warm:Object.fromEntries([1,8].map(c=>[c,Object.fromEntries(['p50Ms','p95Ms','cpuMs','peakProcessTreeRssBytes','requestsPerSecond'].map(m=>[m,median(runs.map(x=>x.warm.find(w=>w.concurrency===c)[m]))]))]))};
 }
 assert.deepEqual(row.ts.output,row.goBefore.output);assert.deepEqual(row.ts.output,row.goAfter.output);
 return row;
});
const report={fixture:after.fixture,method:after.method,validation:{outputs:'All seven response signatures match TypeScript, Go before and Go after in both rounds.',tests:['Targeted race suites passed: large tree scans, index parity/eviction/collisions, website lookup, shared HTTP authorization and representations.','go vet passed.']},summary};
fs.writeFileSync('backend/reports/slower-path-optimization.json',JSON.stringify(report,null,2));
const html=`<!doctype html><html><head><meta charset="utf-8"><style>
body{font-family:var(--font-sans,system-ui);color:var(--foreground,#222);margin:0;line-height:1.5}h2{font-size:22px;margin:0 0 8px}p{color:var(--muted-foreground,#666);margin:10px 0;font-size:14px}select{font:inherit;background:var(--background,white);color:inherit;border:1px solid var(--border,#ddd);border-radius:6px;padding:7px}table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px}th,td{padding:12px 6px;border-bottom:1px solid var(--border,#ddd);text-align:right;font-variant-numeric:tabular-nums}th:first-child,td:first-child{text-align:left;padding-left:0}th{font-size:12px;color:var(--muted-foreground,#666)}.after{color:var(--success,#24724b);font-weight:600}details{margin-top:14px;font-size:13px}.scroll{overflow:auto}label{font-size:13px}#note{font-size:13px}
</style></head><body><h2>Go’s slower paths, corrected</h2><p>Same repository snapshot and 1,000-file directory fixture. Both runtimes rerun in alternating order; all seven successful response signatures still match.</p><label>Measure <select id="mode"><option value="1">Warm median, sequential requests</option><option value="8">Warm median, eight concurrent requests</option><option value="cold">First request</option></select></label><div class="scroll"><table><thead><tr><th>Use case</th><th>TypeScript</th><th>Go before</th><th>Go after</th></tr></thead><tbody id="rows"></tbody></table></div><p id="note"></p><details><summary>Other measured endpoints</summary><div class="scroll"><table><thead><tr><th>Use case</th><th>TypeScript</th><th>Go before</th><th>Go after</th></tr></thead><tbody id="other"></tbody></table></div></details><p>Counts now aggregate by directory in MongoDB. Website files use verified direct lookups or a collision-aware path index, with live snapshot and authorization checks.</p><p style="font-size:12px">Loopback backend timings, identity encoding, shared caches enabled, one worker. Two rounds; medians of per-round medians. Excludes GitHub, CDN and browser rendering. First masked/custom-path requests can still build an index. ZIP was not rerun because these changes do not alter its serving path.</p><script>
const rows=${JSON.stringify(summary)};function draw(){const mode=document.getElementById('mode').value;document.getElementById('rows').replaceChildren();document.getElementById('other').replaceChildren();for(const row of rows){const tr=document.createElement('tr');const name=document.createElement('td');name.textContent=row.name==='website gulpfile.js'?'/w/ file':row.name;tr.append(name);for(const key of ['ts','goBefore','goAfter']){const td=document.createElement('td');td.textContent=(mode==='cold'?row[key].coldMs:row[key].warm[mode].p50Ms).toFixed(1)+' ms';if(key==='goAfter')td.className='after';tr.append(td)}document.getElementById(['file counts','website gulpfile.js'].includes(row.name)?'rows':'other').append(tr)}document.getElementById('note').textContent=mode==='cold'?'First requests can share dependencies warmed by earlier endpoints; filesystem caches were not cleared.':'Warm measurements use 32 requests per endpoint and concurrency level in each round.';}document.getElementById('mode').onchange=draw;draw();
</script></body></html>`;
fs.writeFileSync('backend/reports/slower-path-optimization.html',html);
console.log(JSON.stringify(summary.filter(x=>['file counts','website gulpfile.js'].includes(x.name)),null,2));