Poor performance with new apr_pool

[Mladen Turk]

Just did some quick bench of the current trunk,
and the results are not very much encouraging.

static void test_performance(abts_case *tc, void *data)
{
    apr_status_t rv;
    int i;
    void *m;
    apr_time_t end, now = apr_time_now();

    for (i = 0; i < 1000000; i++) {
        apr_pool_t *p;

        apr_pool_create(&p, NULL);
        m = apr_palloc(p, 1234);
        apr_pool_destroy(p);

    }
    end = apr_time_now();

    printf("\n\nFinished in %ld\n", end - now);

}

Apr 1.4
Finished in 371490

Apr trunk
Finished in 1359345

So the trunk takes almost 4 times longer to finish!

I thought that the problem might be the fact that
each pool creates its own mutex, well if I
#if 0
    (void)apr_thread_mutex_create(&pool->mutex,
                                  APR_THREAD_MUTEX_NESTED, pool);
#endif
inside apr_pool_create_ex, the results are better
Finished in 798145

However this is still twice slower!

Tests performed on
Linux 2.6.18-92.1.13.el5 #1 SMP Thu Sep 4 03:51:01 EDT 2008 i686 i686 i386 
GNU/Linux



Regards
--
^(TM)