Hi all, I'd like to make the tests for numbers compile so that it tests not just the library itself but also the newly added types database (I know, the tests need more work to be able to actually test this properly, but bear with me).
However, compilation time goes through the roof! At first, I thought it was expansion time in this horrible numbers syntax test which was also put in Chicken itself, but it turns out not to be the case. Just compiling the tests that I took from Gauche takes over a minute: $ time csc numbers-test-gauche.scm csc numbers-test-gauche.scm 70.82s user 1.23s system 98% cpu 1:13.24 total (master and 4.7.0 take long) The r4rs tests also take rather long; about 32 seconds. But it gets worse! When you combine the whole bunch by running "csc run.scm" (which contains INCLUDE statements for all the separate test scripts), it takes 7.5 *minutes* to compile (and lots of memory; 256MB - but I consider that less important at the moment), which is of course not acceptable just to run a bunch of tests! It looks like we have a bad case of exponential complexity somewhere in the compiler, since I had expected the total compilation time to be in the ballpark of the sum of the individual compilation times. I was wondering if someone could provide some insight in how to figure out what causes it to take so long to compile. I've already pinpointed that the behaviour is somewhere in the analyzer / code emitter since "csc -P numbers-test-gauche.scm" takes about 1.46 seconds but "csc -A numbers-test-gauche.scm" takes about 10 seconds and "csc -t numbers-test-gauche.scm" takes about 64 seconds. It turns out that compiling with -O0 doesn't change this much and it actually gets worse, so it's probably not some part of the optimizer, which I initially expected. The complexity figures for the whole bulk of run.scm are similar; about a quarter of the compilation time is spent in the analyzing phase. Cheers, Peter -- http://sjamaan.ath.cx -- "The process of preparing programs for a digital computer is especially attractive, not only because it can be economically and scientifically rewarding, but also because it can be an aesthetic experience much like composing poetry or music." -- Donald Knuth _______________________________________________ Chicken-users mailing list Chicken-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/chicken-users
