correctly calculate compression ratio, taking header size into account, too
@@ -314,6 +314,8 @@ class Auto(CompressorBase):
"""
lz4_data = self.lz4.compress(data)
ratio = len(lz4_data) / len(data)
+ # lz4_data includes the compression type header, while data does not yet
+ ratio = len(lz4_data) / (len(data) + 2)
if ratio < 0.97:
return self.compressor, lz4_data
elif ratio < 1:
TW