v8: fix RegExp nits in v8_prof_polyfill.js

* Do not repeat RegExp creation in cycle. * Use sufficient string instead of RegExp in split(). PR-URL: #13709 Reviewed-By: Fedor Indutny <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: James M Snell <[email protected]>
nodejs · Sep 5, 2017 · d5bf137 · d5bf137
1 parent 9e2d85e
commit d5bf137
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/lib/internal/v8_prof_polyfill.js b/lib/internal/v8_prof_polyfill.js
@@ -105,12 +105,13 @@ function versionCheck() {
 function macCppfiltNm(out) {
   // Re-grouped copy-paste from `tickprocessor.js`
   const FUNC_RE = /^([0-9a-fA-F]{8,16} [iItT] )(.*)$/gm;
+  const CLEAN_RE = /^[0-9a-fA-F]{8,16} [iItT] /;
   let entries = out.match(FUNC_RE);
   if (entries === null)
     return out;
 
   entries = entries.map((entry) => {
-    return entry.replace(/^[0-9a-fA-F]{8,16} [iItT] /, '')
+    return entry.replace(CLEAN_RE, '')
   });
 
   let filtered;
@@ -123,7 +124,7 @@ function macCppfiltNm(out) {
   }
 
   let i = 0;
-  filtered = filtered.split(/\n/g);
+  filtered = filtered.split('\n');
   return out.replace(FUNC_RE, (all, prefix, postfix) => {
     return prefix + (filtered[i++] || postfix);
   });