improve text-encoder benchmark

Author: anonrig

build/google-benchmark/MODULE.bazel

@@ -8,7 +8,7 @@ git_repository = use_repo_rule("@bazel_tools//tools/build_defs/repo:git.bzl", "g
 
 git_repository(
     name = "codspeed",
-    commit = "4a4951fb1c6eeb93dbaae7c97fd5b7e3738b43b8",
+    commit = "810d6b4f87f3409673c07c1c04cfdd1ebc2d298f",
     recursive_init_submodules = True,
     remote = "https://github.com/CodSpeedHQ/codspeed-cpp",
 )

src/workerd/tests/bench-text-encoder.c++

@@ -43,11 +43,15 @@ struct TextEncoder: public benchmark::Fixture {
 
             let result;
             if (op === 'encode') {
-              result = encoder.encode(input);
+              for (let i = 0; i < 100_000; i++) {
+                result = encoder.encode(input);
+              }
               return new Response(result.length.toString());
             } else if (op === 'encodeInto') {
               const buffer = new Uint8Array(len * 3); // enough space for any UTF-8 encoding
-              result = encoder.encodeInto(input, buffer);
+              for (let i = 0; i < 100_000; i++) {
+                result = encoder.encodeInto(input, buffer);
+              }
               return new Response(result.written.toString());
             }