export BZIP=--fast

tar cjf foo.tar.bz2 foo

或者将tar的输出传递给bzip2.

虽然你应该从bzip2手册页中注意到：

-1 (or --fast) to -9 (or --best)

Set the block size to 100 k, 200 k .. 900 k when compressing.

Has no effect when decompressing. See MEMORY MANAGEMENT below.

The --fast and --best aliases are primarily for GNU gzip compat-

ibility. In particular, --fast doesn't make things signifi-

cantly faster. And --best merely selects the default behaviour.