Pre-compile ZipFilterAction regex

String.match() compiles the regex on every single invocation. This is not desirable in the inner loop. We can save on regex re-compilation by pre-compiling outside of the nested loop.

PiperOrigin-RevId: 746029685
Change-Id: I8d4001a83804dc6f4493598fd61fe60e011ff08b

Author: ted-xie

src/tools/java/com/google/devtools/build/android/ZipFilterAction.java

@@ -197,12 +197,13 @@ static Multimap<String, Long> getEntriesToOmit(
     }
     // Match any string that ends with any of the filter file types
     String filterRegex = String.format(".*(%s)$", Joiner.on("|").join(escapedFilterTypes));
+    Pattern filterPattern = Pattern.compile(filterRegex);
 
     ImmutableSetMultimap.Builder<String, Long> entriesToOmit = ImmutableSetMultimap.builder();
     for (Path filterZip : filterZips) {
       try (ZipReader zip = new ZipReader(filterZip.toFile())) {
         for (ZipFileEntry entry : zip.entries()) {
-          if (filterTypes.isEmpty() || entry.getName().matches(filterRegex)) {
+          if (filterTypes.isEmpty() || filterPattern.matcher(entry.getName()).matches()) {
             entriesToOmit.put(entry.getName(), entry.getCrc());
           }
         }