fix duplicated benchmark name problem

.github/workflows/benchmark.yml

@@ -35,6 +35,35 @@ jobs:
 
       - name: Run Benchmark
         run: set -o pipefail; go test ./... -benchmem -run=^$ -bench . | tee output.txt
+      ### hack because of the problem with duplicated benchmark names - https://github.com/benchmark-action/github-action-benchmark/issues/264
+      - name: Extract Module Name
+        id: extract-module
+        run: |
+          MODULE_NAME=$(awk '/^module / {print $2}' go.mod)
+          echo "MODULE_NAME=$MODULE_NAME" >> $GITHUB_ENV
+
+      - name: Identify Duplicate Benchmark Names
+        run: |
+          awk '/^Benchmark/ {print $1}' output.txt | sort | uniq -d > duplicate_benchmarks.txt
+
+      - name: Add Normalized Package Prefix to Duplicate Benchmark Names
+        run: |
+          awk -v MODULE_NAME="$MODULE_NAME" '
+            FNR==NR {duplicates[$1]; next}
+            /^pkg: / { package=$2 }
+            /^Benchmark/ {
+              if ($1 in duplicates) {
+                sub("^" MODULE_NAME "/?", "", package)
+                gsub("/", "_", package)
+                print $1 "_" package substr($0, length($1) + 1)
+              } else {
+                print $0
+              }
+              next
+            }
+            { print }
+          ' duplicate_benchmarks.txt output.txt > output.txt
+      ### end
 
       # NOTE: Benchmarks could change with different CPU types
       - name: Get GitHub Runner System Information