#3374 add simple benchmark tool

tests/xpra/codecs/benchmark_png.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+# This file is part of Xpra.
+# Copyright (C) 2021 Antoine Martin <antoine@xpra.org>
+# Xpra is released under the terms of the GNU GPL v2, or, at your option, any
+# later version. See the file COPYING for details.
+
+import sys
+from time import monotonic
+
+from xpra.codecs.image_wrapper import ImageWrapper
+
+N = 10
+
+def main(argv):
+    assert len(argv)>1, "specify images to benchmark"
+    from xpra.net import compression
+    compression.init_all()
+    from xpra.codecs.loader import load_codec, get_codec
+
+    FORMAT = "png"
+    CODECS = ("enc_spng", "enc_pillow")
+    for codec in CODECS:
+        load_codec(codec)
+
+    from PIL import Image
+    for f in argv[1:]:
+        img = Image.open(f)
+        if img.mode not in ("RGBA", "RGB"):
+            img = img.convert("RGB")
+        #img.show()
+        pixel_format = img.mode
+        w, h = img.size
+        rgb_data = img.tobytes("raw")
+        stride = w * len(pixel_format)
+        print("%s : %s" % (f, img))
+        image = ImageWrapper(0, 0, w, h,
+                             rgb_data, pixel_format, len(pixel_format)*8, stride,
+                             planes=ImageWrapper.PACKED, thread_safe=True)
+        for codec in CODECS:
+            enc = get_codec(codec)
+            start = monotonic()
+            for _ in range(N):
+                try:
+                    r = enc.encode(FORMAT, image)
+                except Exception:
+                    print("error on %s.%s" % (enc.get_type(), enc.encode))
+                    raise
+                if not r:
+                    print("Error: no data")
+                    break
+            end = monotonic()
+            print("%-10s   :    %.1f MPixels/s" % (enc.get_type(), w*h*N/(end-start)/1024/1024))
+            cdata = r[1]
+            #verify that the png data is valid using pillow:
+            from io import BytesIO 
+            buf = BytesIO(cdata.data)
+            img = Image.open(buf)
+            #img.show()
+
+if __name__ == '__main__':
+    main(sys.argv)