Thanks for the replies... Tweaking the optimization settings did very little for the running time.
However a huge difference (factor of 2) comes from taking out --show-reachable=yes --track-origins=yes except they are very very useful... so I sort of don't want to. On Tue, Nov 6, 2018 at 9:43 AM Philippe Waroquiers < philippe.waroqui...@skynet.be> wrote: > On Sun, 2018-11-04 at 20:36 -0800, John Reiser wrote: > > > What techniques can we employ to speed things up (whilst retaining > most of the value)? > > > The memcheck option --expensive-definedness-checks= already defaults to > 'no'. > Note that it defaults to 'auto' in 3.14. > > > Specifying --redzone-size=8 might save 16 bytes of memory for each > allocation, > > which helps if there are many small allocations. But default > --alignment=16 > > is required for common SSE2 instructions [used by other glibc routines > on the blocks, > > etc.], and the redzone is not the only per-block overhead (see > --keep-stacktraces= > > and --num-callers=), so experimentation may be required. > > > > If all you care about is memory leaks, then experiment with > --undef-value-errors=no > > and even non-valgrind tools [such as mtrace (malloc trace)] that are > specialized > > for detecting leaks. > > You might look at the FOSDEM presentation > 'Tuning Valgrind for your Workload > Hints, tricks and tips to effectively use Valgrind on small or big > > applications' > https://archive.fosdem.org/2015/schedule/event/valgrind_tuning/ > > for other suggestions. > > Philippe > > > > _______________________________________________ > Valgrind-users mailing list > Valgrind-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/valgrind-users > -- John Carter Phone : (64)(3) 358 6639 Tait Electronics PO Box 1645 Christchurch New Zealand -- This Communication is Confidential. We only send and receive email on the basis of the terms set out at www.taitradio.com/email_disclaimer <http://www.taitradio.com/email_disclaimer>
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