Have any of you experience with jemalloc or TCMalloc?
http://goog-perftools.sourceforge.net/doc/tcmalloc.html
On 09/10/2017 08:26 AM, Thiago Macieira wrote:
On Saturday, 9 September 2017 17:16:24 -03 Sean Harmer wrote:
Yes, vtune shows the line
static_cast<ExternalRefCountWithContiguousData *>(::operator
new(sizeof(ExternalRefCountWithContiguousData)));
is the bottleneck in this particular test case, qt3d/tests/manual/bigscene-
cpp. I maybe able to reduce the calls to this by a small constant factor but
I'm not sure yet, need to do some more digging/experimenting. So using a
pool seemed like a viable approach to reducing this bottleneck.
Granted, this is an extreme stress test (1k QEntities, each with 2 x
QPropertyAnimations) but it makes a nice one to profile.
Well, if you microbenchmark, then memory allocation is almost always a
bottleneck. I'd be more interested in real-world numbers.
But anyway, I don't see a way to pool the private pointers. You always get a
new one if you add a new pointer to an object.
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