BCM
BCM is a relatively new file compression program by Ilia Muraviev. It is important to note that the 64-bit version of BCM is not simply a different compilation of the 32-bit code; rather they are two programs with different code, and Ilia has given the 64-bit version the majority of his development attention.
BCM v0.10 by Ilia Muraviev Usage: BCM [options] input [output] Options: -b# Set block size to # MB (default is 64) -d Decompress -f Force overwrite
| Command | 32-bit | 64-bit | Difference |
|---|---|---|---|
| Average | -4.525% | ||
bcm -b64 |
479.609 | 445.523 | -7.107% |
bcm -b128 |
482.308 | 464.570 | -3.678% |
bcm -b256 |
504.725 | 490.638 | -2.791% |
bcm -b384 |
528.030 | 513.009 | -2.845% |
BCM saw marginal improvements in the 64-bit version. -b384 was the highest setting I could test, because the 32-bit version was unable to use a blocksize of 512MB