On 2012-05-23, at 11:09 PM, Bradley Lucier wrote:

Marc:

LLVM 3.1 has been released; perhaps some of the problems you were seeing while compiling Gambit have been addressed.

Brad

http://llvm.org/releases/3.1/docs/ReleaseNotes.html

Here are the updated numbers including clang 3.1 :

**** Execution time of tests/mix.scm when run by gsi

| --enable-multiple-hosts | --enable-single-host | | | --enable-c-opt | | --enable-c-opt | clang | secs rel | secs rel | secs rel | secs rel | -------+----------------+----------------+----------------+----------------+ 2.6 | 4.35 ( 1.59) | 4.41 ( 1.61) | 2.74 ( 1.00) | 2.79 ( 1.02) | -------+----------------+----------------+----------------+----------------+ 3.0 | 3.83 ( 1.40) | 3.76 ( 1.37) | 4.49 ( 1.64) | 4.87 ( 1.78) | -------+----------------+----------------+----------------+----------------+ 3.1 | 3.82 ( 1.39) | 3.89 ( 1.42) | 4.32 ( 1.58) | 4.90 ( 1.79) | -------+----------------+----------------+----------------+----------------+

**** Elapsed time of "make"

| --enable-multiple-hosts | --enable-single-host | | | --enable-c-opt | | --enable-c-opt | clang | secs rel | secs rel | secs rel | secs rel | -------+----------------+----------------+----------------+----------------+ 2.6 | 95.7 ( 1.12) | 96.0 ( 1.12) | 694.4 ( 8.10) | 699.1 ( 8.16) | -------+----------------+----------------+----------------+----------------+ 3.0 | 164.3 ( 1.92) | 127.2 ( 1.48) | 4313.0 (50.33) | 1825.3 (21.30) | -------+----------------+----------------+----------------+----------------+ 3.1 | 90.1 ( 1.05) | 85.7 ( 1.00) | 1110.0 (12.95) | 915.7 (10.68) | -------+----------------+----------------+----------------+----------------+

As you can see there is a small difference in the speed of the interpreter compiled with clang 3.1 and clang 3.0. However the compilation times are much better (closer to the speed of clang 2.6). With --enable-single-host, the build time with clang 3.1 is still 3 to 10 times bigger than with gcc 4.7.0 .

Marc