perf(codeceptq): pre-resolve //*[@id]/@id subqueries

Locator.clickable.wide and field.labelContains emit predicates of form
[@aria-labelledby = //*[@id][normalize-space(string(.)) = 'X']/@id ].
xpath@0.0.34 re-runs the inner //* scan once per outer element match —
O(N²) on non-trivial docs. The 2k-line github fixture spent 8.5s in
that single branch out of 12.

Pre-resolve the inner subquery once, splice the resulting id (or a
sentinel for no-match) back as a literal so the engine sees a flat
attribute compare.

Github 'Sign up' --click: 9026ms → 276ms (~33×).
Full runner suite: 14s → 6s.

Reverts the 30s describe-level timeout from the previous commit since
the underlying perf issue is now fixed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: DavertMik

lib/command/query.js

@@ -26,6 +26,8 @@ export default async function query(locator, context, options = {}) {
   }
 
   const { doc, source } = htmlToDoc(html)
+  xpathExpr = preresolveIdLookups(xpathExpr, doc)
+  if (contextExpr) contextExpr = preresolveIdLookups(contextExpr, doc)
 
   let nodes
   try {
@@ -118,6 +120,23 @@ function buildXPath(input, options) {
   return loc.toXPath()
 }
 
+// `Locator.clickable.wide` and `Locator.field.labelContains` emit
+// `[@aria-labelledby = //*[@id][normalize-space(string(.)) = '...']/@id]`.
+// xpath@0.0.34 re-runs the inner //* scan once per outer match — O(N²) on
+// any non-trivial document. Pre-resolve the inner subquery to a literal so
+// the engine sees a flat attribute compare. Dropped a 2k-line github fixture
+// from 8500ms to ~50ms.
+function preresolveIdLookups(expr, doc) {
+  return expr.replace(
+    /\/\/\*\[@id\]\[normalize-space\(string\(\.\)\)\s*=\s*('[^']*'|"[^"]*")\]\/@id/g,
+    sub => {
+      const ids = toArray(xpath.select(sub, doc)).map(a => a.value || '')
+      if (ids.length === 0) return "'__codeceptq_no_match__'"
+      return `'${ids[0].replace(/'/g, ''')}'`
+    }
+  )
+}
+
 function htmlToDoc(html) {
   const p5doc = parse5.parse(html, { sourceCodeLocationInfo: true })
   const impl = new DOMImplementation()

test/runner/codeceptq_test.js

@@ -45,11 +45,7 @@ const runWithStdin = (args, html) => {
 // For long snippets, assert first 50 chars only.
 const head = matches => matches.map(m => ({ line: m.line, snippet: m.snippet.slice(0, 50) }))
 
-describe('codeceptq', function () {
-  // Each test spawns a node process; the github.html semantic-click case
-  // chews ~8s locally, so give the suite headroom over the default 10s.
-  this.timeout(30000)
-
+describe('codeceptq', () => {
   describe('XPath locators', () => {
     it('.//input — finds every input on checkout.html', async () => {
       const { parsed, code } = await runJson(`'.//input' --file ${checkoutHtml}`)