tree 2cdb43b4b42408146a5c07cabbe6511afe4c6d18
parent aae33735e69931106bed4a6d5a32bfcc4631dee2
author Antonio Maiorano <amaiorano@google.com> 1581964777 -0500
committer Antonio Maiorano <amaiorano@google.com> 1581973298 +0000

Cache callstack results to avoid expensive lookup

This works well as our use-case is to lookup the same addresses multiple
times (loops, helper functions, etc.). With a simple timing of
ReactorUnitTests.exe, with this optimization enabled, total time dropped
from 16.72 seconds to 2.24 seconds (~7.5X faster).

This optimization is especially important for Mac where resolving stack
addresses takes much longer than on other platforms. With this
optimization, running a specific gles-unittests test, it was able to
output the callstack trace in about 30 seconds; without, it was still
emitting jit code after 10 minutes at which point I gave up.

Bug: b/131425026
Change-Id: I97e76256220f73fba0a1fc4099532e833f561551
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/32369
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>