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Increase buffer size to speedup Image.tobytes()

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This commit is contained in:
Lukas Geiger 2025-09-23 12:36:35 +01:00
parent d42e537efe
commit fc5a9023e5
1 changed files with 5 additions and 1 deletions
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6
src/PIL/Image.py
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@ -793,7 +793,11 @@ class Image:
from . import ImageFile
bufsize = max(ImageFile.MAXBLOCK, self.size[0] * 4) # see RawEncode.c
mode_descr = ImageMode.getmode(self.mode)
bytes_per_value = int(mode_descr.typestr[-1])
channels = len(mode_descr.bands)
bufsize = self.height * self.width * channels * bytes_per_value
bufsize = max(ImageFile.MAXBLOCK, bufsize) # see RawEncode.c
output = []
while True: