36a37,38
> - Add the "opt.prof_final" mallctl.
> - Update pprof (from gperftools 2.0).
43a46,47
> - Change the "opt.lg_prof_sample" default from 0 to 19 (1 B to 512 KiB).
> - Change the "opt.prof_accum" default from true to false.
79a84
> - Don't mangle pthread_create() when --with-private-namespace is specified.