benchmark-action · ktrz · Jan 8, 2026 · Jan 30, 2026 · Jan 30, 2026 · Jan 30, 2026
diff --git a/.coderabbit.yaml b/.coderabbit.yaml
@@ -0,0 +1,4 @@
+reviews:
+  pre_merge_checks:
+    docstrings:
+      mode: "off"
diff --git a/.gitignore b/.gitignore
@@ -10,6 +10,7 @@
 /coverage
 /dist
 /.idea
+/.ai
 target/
 jmh-result.json
 .env
diff --git a/package.json b/package.json
@@ -11,6 +11,7 @@
     "format": "prettier -w **",
     "format:check": "prettier -c **",
     "test": "jest",
+    "test-s": "jest --silent",
     "test:watch": "jest --watch",
     "coverage": "jest --coverage",
     "coverage:open": "jest --coverage && open ./coverage/lcov-report/index.html"

diff --git a/src/extract.ts b/src/extract.ts
@@ -34,7 +34,7 @@
 }

 interface PullRequest {
    [key: string]: any;
    number: number;
    html_url?: string;
    body?: string;
@@ -343,9 +343,16 @@
     return ret;
 }
 
-function extractGoResult(output: string): BenchmarkResult[] {
-    const lines = output.split(/\r?\n/g);
-    const ret = [];
+export function extractGoResult(output: string): BenchmarkResult[] {
+    // Split into sections by "pkg:" lines, keeping package name with each section
+    const sections = output.split(/^pkg:\s+/m).map((section, index) => {
+        if (index === 0) return { pkg: '', lines: section.split(/\r?\n/g) };
+        const [pkg, ...rest] = section.split(/\r?\n/g);
+        return { pkg, lines: rest };
+    });
+
+    const hasMultiplePackages = sections.filter((s) => s.pkg).length > 1;
+
     // Example:
     //   BenchmarkFib20-8           30000             41653 ns/op
     //   BenchmarkDoWithConfigurer1-8            30000000                42.3 ns/op
@@ -356,15 +363,19 @@
     // reference, "Proposal: Go Benchmark Data Format": https://go.googlesource.com/proposal/+/master/design/14313-benchmark-format.md
     // "A benchmark result line has the general form: <name> <iterations> <value> <unit> [<value> <unit>...]"
     // "The fields are separated by runs of space characters (as defined by unicode.IsSpace), so the line can be parsed with strings.Fields. The line must have an even number of fields, and at least four."
-    const reExtract =
+    const reExtractRegexp =
         /^(?<name>Benchmark\w+[\w()$%^&*-=|,[\]{}"#]*?)(?<procs>-\d+)?\s+(?<times>\d+)\s+(?<remainder>.+)$/;
 
-    for (const line of lines) {
-        const m = line.match(reExtract);
-        if (m?.groups) {
-            const procs = m.groups.procs !== undefined ? m.groups.procs.slice(1) : null;
-            const times = m.groups.times;
-            const remainder = m.groups.remainder;
+    // Flatten sections into lines with package context, then process each line
+    return sections
+        .flatMap(({ pkg, lines }) => lines.map((line) => ({ pkg, line })))
+        .flatMap(({ pkg, line }) => {
+            const match = line.match(reExtractRegexp);
+            if (!match?.groups) return [];
+
+            const { name, procs: procsRaw, times, remainder } = match.groups;
+            const procs = procsRaw?.slice(1) ?? null;
+            const extra = procs !== null ? `${times} times\n${procs} procs` : `${times} times`;
 
             const pieces = remainder.split(/[ \t]+/);
 
@@ -374,25 +385,19 @@
                 pieces.unshift(pieces[0], remainder.slice(remainder.indexOf(pieces[1])));
             }
 
-            for (let i = 0; i < pieces.length; i = i + 2) {
-                let extra = `${times} times`.replace(/\s\s+/g, ' ');
-                if (procs !== null) {
-                    extra += `\n${procs} procs`;
-                }
-                const value = parseFloat(pieces[i]);
-                const unit = pieces[i + 1];
-                let name;
-                if (i > 0) {
-                    name = m.groups.name + ' - ' + unit;
-                } else {
-                    name = m.groups.name;
-                }
-                ret.push({ name, value, unit, extra });
-            }
-        }
-    }
+            const baseName = hasMultiplePackages && pkg ? `${name} (${pkg})` : name;
+            // Chunk into [value, unit] pairs and map to results
+            return chunkPairs(pieces).map(([valueStr, unit], i) => ({
+                name: i > 0 ? `${baseName} - ${unit}` : baseName,
+                value: parseFloat(valueStr),
+                unit,
+                extra,
+            }));
+        });
+}
 
-    return ret;
+function chunkPairs(arr: string[]): Array<[string, string]> {
+    return Array.from({ length: Math.floor(arr.length / 2) }, (_, i) => [arr[i * 2], arr[i * 2 + 1]]);
-function chunkPairs(arr: string[]): Array<[string, string]> {
-    return Array.from({ length: Math.floor(arr.length / 2) }, (_, i) => [arr[i * 2], arr[i * 2 + 1]]);
+function chunkPairs(arr: string[]): Array<[string, string]> {
+    if (arr.length % 2 !== 0) {
+        throw new Error(
+            `Malformed Go benchmark metrics (expected value/unit pairs, got ${arr.length} fields): ${arr.join(' ')}`
+        );
+    }
+    return Array.from({ length: Math.floor(arr.length / 2) }, (_, i) => [arr[i * 2], arr[i * 2 + 1]]);
+}
-function chunkPairs(arr: string[]): Array<[string, string]> {
-    return Array.from({ length: Math.floor(arr.length / 2) }, (_, i) => [arr[i * 2], arr[i * 2 + 1]]);
+function chunkPairs(arr: string[]): Array<[string, string]> {
+    if (arr.length % 2 !== 0) {
+        throw new Error(
+            `Malformed Go benchmark metrics (expected value/unit pairs, got ${arr.length} fields): ${arr.join(' ')}`
+        );
+    }
+    return Array.from({ length: Math.floor(arr.length / 2) }, (_, i) => [arr[i * 2], arr[i * 2 + 1]]);
+}
 }
 
 function extractBenchmarkJsResult(output: string): BenchmarkResult[] {
@@ -441,7 +446,7 @@
            const extra = `mean: ${mean} ${meanUnit}\nrounds: ${stats.rounds}`;
            return { name, value, unit, range, extra };
        });
    } catch (err: any) {
        throw new Error(
            `Output file for 'pytest' must be JSON file generated by --benchmark-json option: ${err.message}`,
        );
@@ -452,7 +457,7 @@
    let json: GoogleCppBenchmarkJson;
    try {
        json = JSON.parse(output);
    } catch (err: any) {
        throw new Error(
            `Output file for 'googlecpp' must be JSON file generated by --benchmark_format=json option: ${err.message}`,
        );
@@ -580,7 +585,7 @@
    return ret;
 }

 function extractJuliaBenchmarkHelper([_, bench]: JuliaBenchmarkGroup, labels: string[] = []): BenchmarkResult[] {
    const res: BenchmarkResult[] = [];
    for (const key in bench.data) {
        const value = bench.data[key];
@@ -611,7 +616,7 @@
    let json: JuliaBenchmarkJson;
    try {
        json = JSON.parse(output);
    } catch (err: any) {
        throw new Error(
            `Output file for 'julia' must be JSON file generated by BenchmarkTools.save("output.json", suit::BenchmarkGroup) :  ${err.message}`,
        );
@@ -629,7 +634,7 @@
    let json: JmhBenchmarkJson[];
    try {
        json = JSON.parse(output);
    } catch (err: any) {
        throw new Error(`Output file for 'jmh' must be JSON file generated by -rf json option: ${err.message}`);
    }
    return json.map((b) => {
@@ -646,7 +651,7 @@
    let json: BenchmarkDotNetBenchmarkJson;
    try {
        json = JSON.parse(output);
    } catch (err: any) {
        throw new Error(
            `Output file for 'benchmarkdotnet' must be JSON file generated by '--exporters json' option or by adding the JsonExporter to your run config: ${err.message}`,
        );

diff --git a/test/__snapshots__/extract.spec.ts.snap b/test/__snapshots__/extract.spec.ts.snap
@@ -524,6 +524,163 @@ exports[`extractResult() extracts benchmark output from customSmallerIsBetter -
 }
 `;
 
+exports[`extractResult() extracts benchmark output from go - go_fiber_duplicate_names_output.txt 1`] = `
+{
+  "benches": [
+    {
+      "extra": "21228057 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/cache)",
+      "unit": "ns/op	2833.37 MB/s	       0 B/op	       0 allocs/op",
+      "value": 55.76,
+    },
+    {
+      "extra": "21228057 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/cache) - ns/op",
+      "unit": "ns/op",
+      "value": 55.76,
+    },
+    {
+      "extra": "21228057 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/cache) - MB/s",
+      "unit": "MB/s",
+      "value": 2833.37,
+    },
+    {
+      "extra": "21228057 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/cache) - B/op",
+      "unit": "B/op",
+      "value": 0,
+    },
+    {
+      "extra": "21228057 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/cache) - allocs/op",
+      "unit": "allocs/op",
+      "value": 0,
+    },
+    {
+      "extra": "6855655 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/cache)",
+      "unit": "ns/op	 907.83 MB/s	       0 B/op	       0 allocs/op",
+      "value": 174,
+    },
+    {
+      "extra": "6855655 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/cache) - ns/op",
+      "unit": "ns/op",
+      "value": 174,
+    },
+    {
+      "extra": "6855655 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/cache) - MB/s",
+      "unit": "MB/s",
+      "value": 907.83,
+    },
+    {
+      "extra": "6855655 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/cache) - B/op",
+      "unit": "B/op",
+      "value": 0,
+    },
+    {
+      "extra": "6855655 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/cache) - allocs/op",
+      "unit": "allocs/op",
+      "value": 0,
+    },
+    {
+      "extra": "1000000000 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/csrf)",
+      "unit": "ns/op	2678.46 MB/s	       0 B/op	       0 allocs/op",
+      "value": 0.3733,
+    },
+    {
+      "extra": "1000000000 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/csrf) - ns/op",
+      "unit": "ns/op",
+      "value": 0.3733,
+    },
+    {
+      "extra": "1000000000 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/csrf) - MB/s",
+      "unit": "MB/s",
+      "value": 2678.46,
+    },
+    {
+      "extra": "1000000000 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/csrf) - B/op",
+      "unit": "B/op",
+      "value": 0,
+    },
+    {
+      "extra": "1000000000 times
+4 procs",
+      "name": "BenchmarkAppendMsgitem (github.com/gofiber/fiber/v3/middleware/csrf) - allocs/op",
+      "unit": "allocs/op",
+      "value": 0,
+    },
+    {
+      "extra": "275056135 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/csrf)",
+      "unit": "ns/op	 229.35 MB/s	       0 B/op	       0 allocs/op",
+      "value": 4.36,
+    },
+    {
+      "extra": "275056135 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/csrf) - ns/op",
+      "unit": "ns/op",
+      "value": 4.36,
+    },
+    {
+      "extra": "275056135 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/csrf) - MB/s",
+      "unit": "MB/s",
+      "value": 229.35,
+    },
+    {
+      "extra": "275056135 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/csrf) - B/op",
+      "unit": "B/op",
+      "value": 0,
+    },
+    {
+      "extra": "275056135 times
+4 procs",
+      "name": "BenchmarkUnmarshalitem (github.com/gofiber/fiber/v3/middleware/csrf) - allocs/op",
+      "unit": "allocs/op",
+      "value": 0,
+    },
+  ],
+  "commit": {
+    "author": null,
+    "committer": null,
+    "id": "123456789abcdef",
+    "message": "this is dummy",
+    "timestamp": "dummy timestamp",
+    "url": "https://github.com/dummy/repo",
+  },
+  "date": 1712131503296,
+  "tool": "go",
+}
+`;
+
 exports[`extractResult() extracts benchmark output from go - go_fiber_output.txt 1`] = `
 {
   "benches": [
@@ -806,6 +963,37 @@ exports[`extractResult() extracts benchmark output from go - go_output.txt 1`] =
 }
 `;
 
+exports[`extractResult() extracts benchmark output from go - go_single_package_output.txt 1`] = `
+{
+  "benches": [
+    {
+      "extra": "5000000 times
+8 procs",
+      "name": "BenchmarkFib10",
+      "unit": "ns/op",
+      "value": 325,
+    },
+    {
+      "extra": "30000 times
+8 procs",
+      "name": "BenchmarkFib20",
+      "unit": "ns/op",
+      "value": 40537,
+    },
+  ],
+  "commit": {
+    "author": null,
+    "committer": null,
+    "id": "123456789abcdef",
+    "message": "this is dummy",
+    "timestamp": "dummy timestamp",
+    "url": "https://github.com/dummy/repo",
+  },
+  "date": 1712131503296,
+  "tool": "go",
+}
+`;
+
 exports[`extractResult() extracts benchmark output from googlecpp - googlecpp_output.json 1`] = `
 {
   "benches": [

diff --git a/test/data/extract/go_fiber_duplicate_names_output.txt b/test/data/extract/go_fiber_duplicate_names_output.txt
@@ -0,0 +1,27 @@
+PASS
+ok  	github.com/gofiber/fiber/v3/log	0.173s
+PASS
+ok  	github.com/gofiber/fiber/v3/middleware/adaptor	0.184s
+PASS
+ok  	github.com/gofiber/fiber/v3/middleware/basicauth	0.173s
+goos: linux
+goarch: amd64
+pkg: github.com/gofiber/fiber/v3/middleware/cache
+cpu: AMD EPYC 7763 64-Core Processor
+BenchmarkAppendMsgitem-4              	21228057	        55.76 ns/op	2833.37 MB/s	       0 B/op	       0 allocs/op
+BenchmarkUnmarshalitem-4              	 6855655	       174.0 ns/op	 907.83 MB/s	       0 B/op	       0 allocs/op
+PASS
+ok  	github.com/gofiber/fiber/v3/middleware/cache	2.649s
+PASS
+ok  	github.com/gofiber/fiber/v3/middleware/compress	0.219s
+PASS
+ok  	github.com/gofiber/fiber/v3/middleware/cors	0.188s
+goos: linux
+goarch: amd64
+pkg: github.com/gofiber/fiber/v3/middleware/csrf
+cpu: AMD EPYC 7763 64-Core Processor
+BenchmarkAppendMsgitem-4                    	1000000000	         0.3733 ns/op	2678.46 MB/s	       0 B/op	       0 allocs/op
+BenchmarkUnmarshalitem-4                    	275056135	         4.360 ns/op	 229.35 MB/s	       0 B/op	       0 allocs/op
+PASS
+ok  	github.com/gofiber/fiber/v3/middleware/csrf	0.842s
+PASS
diff --git a/test/data/extract/go_single_package_output.txt b/test/data/extract/go_single_package_output.txt
@@ -0,0 +1,9 @@
+goos: darwin
+goarch: arm64
+pkg: github.com/example/mypackage
+BenchmarkFib10
+BenchmarkFib10-8    	5000000	       325 ns/op
+BenchmarkFib20
+BenchmarkFib20-8    	  30000	     40537 ns/op
+PASS
+ok  	github.com/example/mypackage	3.614s
diff --git a/test/extract.spec.ts b/test/extract.spec.ts
@@ -95,6 +95,14 @@ describe('extractResult()', function () {
             tool: 'go',
             file: 'go_fiber_output.txt',
         },
+        {
+            tool: 'go',
+            file: 'go_fiber_duplicate_names_output.txt',
+        },
+        {
+            tool: 'go',
+            file: 'go_single_package_output.txt',
+        },
         {
             tool: 'benchmarkjs',
             file: 'benchmarkjs_output.txt',
-Original file line number
+Diff line change
@@ Expand Up / @@ -10,6 +10,7 @@ @@
     /coverage
     /dist
     /.idea
+    /.ai
     target/
     jmh-result.json
     .env