Add folder for perf profiler files

Author: bzaczynski

python-312/perf-profiler/benchmark.py

@@ -0,0 +1,50 @@
+import sys
+import sysconfig
+from math import exp, log
+from statistics import mean
+
+from PIL import Image
+
+
+def check_perf_support():
+    if sys.version_info < (3, 12):
+        version = sysconfig.get_python_version()
+        raise RuntimeError(f"This is Python {version}, not 3.12 or later")
+
+    if not sysconfig.get_config_var("PY_HAVE_PERF_TRAMPOLINE"):
+        raise RuntimeError("Python doesn't support perf on this platform")
+
+    if not sys.is_stack_trampoline_active():
+        raise RuntimeError("Did you forget the '-X perf' option?")
+
+    cflags = sysconfig.get_config_var("CONFIGURE_CFLAGS")
+    if "-fno-omit-frame-pointer" not in cflags:
+        print("Python compiled without the frame pointer", file=sys.stderr)
+
+
+def main():
+    image = Image.open("image.jpg")
+    print("luminance =", get_average_luminance(image.getdata()))
+    image.show()
+
+
+def get_average_luminance(pixels):
+    return exp(mean(log(luminance(pixel) + 1e-9) for pixel in pixels))
+
+
+def luminance(pixel):
+    red, green, blue = tuple(linearize(c) for c in pixel)
+    return 0.2126 * red + 0.7152 * green + 0.0722 * blue
+
+
+def linearize(channel, gamma=2.2):
+    return (channel / 255) ** gamma
+
+
+if __name__ == "__main__":
+    try:
+        check_perf_support()
+    except RuntimeError as error:
+        print(error, file=sys.stderr)
+    else:
+        main()

python-312/perf-profiler/benchmark_optimized.py

@@ -0,0 +1,53 @@
+import sys
+import sysconfig
+from math import exp, log
+
+from PIL import Image
+
+
+def check_perf_support():
+    if sys.version_info < (3, 12):
+        version = sysconfig.get_python_version()
+        raise RuntimeError(f"This is Python {version}, not 3.12 or later")
+
+    if not sysconfig.get_config_var("PY_HAVE_PERF_TRAMPOLINE"):
+        raise RuntimeError("Python doesn't support perf on this platform")
+
+    if not sys.is_stack_trampoline_active():
+        raise RuntimeError("Did you forget the '-X perf' option?")
+
+    cflags = sysconfig.get_config_var("CONFIGURE_CFLAGS")
+    if "-fno-omit-frame-pointer" not in cflags:
+        print("Python compiled without the frame pointer", file=sys.stderr)
+
+
+def main():
+    image = Image.open("image.jpg")
+    print("luminance =", get_average_luminance(image.getdata()))
+    image.show()
+
+
+def get_average_luminance(pixels):
+    return exp(mean([log(luminance(pixel) + 1e-9) for pixel in pixels]))
+
+
+def mean(n):
+    return sum(n) / len(n)
+
+
+def luminance(pixel):
+    red, green, blue = tuple(linearize(c) for c in pixel)
+    return 0.2126 * red + 0.7152 * green + 0.0722 * blue
+
+
+def linearize(channel, gamma=2.2):
+    return (channel / 255) ** gamma
+
+
+if __name__ == "__main__":
+    try:
+        check_perf_support()
+    except RuntimeError as error:
+        print(error, file=sys.stderr)
+    else:
+        main()

python-312/perf-profiler/censor.py

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+import sys
+from argparse import ArgumentParser
+
+
+def main(args):
+    censorship = censor(args.modules)
+    for line in sys.stdin:
+        stack_trace, num_samples = line.rsplit(maxsplit=1)
+        symbols = filter(censorship, stack_trace.split(";"))
+        censored_stack_trace = ";".join(symbols)
+        if censored_stack_trace:
+            print(censored_stack_trace, num_samples)
+
+
+def parse_args():
+    parser = ArgumentParser()
+    parser.add_argument(
+        "-m", "--modules", default=[], type=lambda s: s.split(",")
+    )
+    return parser.parse_args()
+
+
+def censor(modules):
+    def is_valid(symbol):
+        if not symbol.startswith("py::"):
+            return False
+        if modules:
+            return any(module in symbol for module in modules)
+        return True
+
+    return is_valid
+
+
+if __name__ == "__main__":
+    main(parse_args())

python-312/perf-profiler/image.jpg

@@ -0,0 +1 @@
+Pillow==9.5.0