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There are two phases on raw

There are two phases on raw processing:
- raw data decoding (decompressing)
- and postprocessing (black subtraction, white balance, demosaic, color conversion)

For Canon files, decoding is relatively slow, thanks for huffman compression used. RawSpeed is faster than LibRaw for these files (but you can use RawSpeed indirectly via LibRaw).

Postprocessing speed varies from method to method. For timelapse (e.g. video output in 1080p?) you don't need full resolution, so 'half' demosaic may be used.

The LibRaw's benchmark is 'samples/postprocessing-benchmark.cpp' which is included in LibRaw since v0.15

-- Alex Tutubalin