On 10/02/2014 09:47 AM, Zdenek Kabelac wrote:
Dne 2.10.2014 v 08:33 Lennart Poettering napsal(a):
On the other hand - usage of dash significantly speeds up compilation of
autoconf projects - it's pretty interesting to see the compilation with
dash
is then maybe even 50% faster in non optimized builds (depends on how
many shells are forked during autoconf builds)
I don't know what you tested, but I don't see a substantial speed up on
running autoconf-generated configure scripts:
# time SHELL=/bin/bash CONFIG_SHELL=/bin/bash /bin/bash ../configure ...
...
real 0m5.775s
user 0m0.528s
sys 0m0.217s
# time SHELL=/bin/dash CONFIG_SHELL=/bin/dash /bin/dash ../configure ...
...
real 0m5.495s
user 0m0.340s
sys 0m0.194s
Another, more extensive test case:
* bash;
real 1m43.115s
user 0m34.708s
sys 0m16.322s
* dash:
real 1m33.283s
user 0m30.834s
sys 0m13.932s
In other words, I am observing a 5-10% speed up on running autoconf
configure scripts.
Ralf
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