GODRIVER-3102: Post perf comparison

.evergreen/config.yml

@@ -285,6 +285,17 @@ functions:
           echo "Response Body: $response_body"
           echo "HTTP Status: $http_status"
 
+  send-perf-pr-comment:
+    - command: subprocess.exec
+      type: test
+      params:
+        binary: bash
+        env:
+          COMMIT: "${github_commit}"
+          VERSION_ID: ${version_id}
+        include_expansions_in_env: [perf_uri_private_endpoint]
+        args: [*task-runner, perf-pr-comment]
+
   run-enterprise-auth-tests:
     - command: ec2.assume_role
       params:
@@ -676,6 +687,7 @@ tasks:
           binary: bash
           args: [*task-runner, driver-benchmark]
       - func: send-perf-data
+      - func: send-perf-pr-comment
 
   - name: test-standalone-noauth-nossl
     tags: ["test", "standalone"]

Taskfile.yml

@@ -70,6 +70,8 @@ tasks:
 
   pr-task: bash etc/pr-task.sh
 
+  perf-pr-comment: bash etc/perf-pr-comment.sh
+
   # Lint with various GOOS and GOARCH tasks to catch static analysis failures that may only affect
   # specific operating systems or architectures. For example, staticcheck will only check for 64-bit
   # alignment of atomically accessed variables on 32-bit architectures (see

etc/perf-pr-comment.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+# perf-pr-comment
+# Generates a report of Go Driver perf changes for the current branch.
+
+set -eux
+
+go run ./internal/cmd/perfcomp/main.go ./internal/cmd/perfcomp/energystatistics.go

go.work

@@ -7,6 +7,7 @@ use (
 	./examples/_logger/zerolog
 	./internal/cmd/benchmark
 	./internal/cmd/compilecheck
+	./internal/cmd/perfcomp
 	./internal/cmd/faas/awslambda/mongodb
 	./internal/test/goleak
 )

internal/cmd/benchmark/benchmark_test.go

@@ -240,6 +240,7 @@ func benchmarkBSONDecoding(b *testing.B, canonicalOnly bool, source string) {
 
 	for i := 0; i < b.N; i++ {
 		recordMetrics(b, metrics, func(b *testing.B) {
+			time.Sleep(100 * time.Millisecond)
 			var out bson.D
 
 			err := bson.Unmarshal(raw, &out)