feat(perf-issues): Add performance issue detection timing runner command (#44912)

Pretty handy, and I think it'll be useful in the
future. Good for verifying time complexity

Author: gggritso

src/sentry/runner/__init__.py

@@ -71,7 +71,6 @@ def cli(ctx, config):
         "sentry.runner.commands.permissions.permissions",
         "sentry.runner.commands.devservices.devservices",
         "sentry.runner.commands.performance.performance",
-        "sentry.runner.commands.performance.detect",
         "sentry.runner.commands.spans.spans",
         "sentry.runner.commands.spans.write_hashes",
     ),

src/sentry/runner/commands/performance.py

@@ -71,3 +71,36 @@ def detect(filename, detector_class, verbose):
                     click.echo(problem)
 
             click.echo("\n")
+
+
+@performance.command()
+@click.argument("filename", type=click.Path(exists=True))
+@click.option("-d", "--detector", "detector_class", help="Detector class", required=True)
+@click.option(
+    "-n", required=False, type=int, default=1000, help="Number of times to run detection."
+)
+@configuration
+def timeit(filename, detector_class, n):
+    """
+    Runs timing on performance problem detection on event data in the supplied
+    filename and report results.
+    """
+
+    click.echo(f"Running timeit {n} times on {detector_class}")
+
+    import timeit
+
+    from sentry.utils.performance_issues import performance_detection
+
+    settings = performance_detection.get_detection_settings()
+
+    with open(filename) as file:
+        data = json.loads(file.read())
+
+    detector = performance_detection.__dict__[detector_class](settings, data)
+
+    def detect():
+        performance_detection.run_detector_on_data(detector, data)
+
+    result = timeit.timeit(stmt=detect, number=n)
+    click.echo(f"Average runtime: {result * 1000 / n} ms")