Multiple performance regressions in 3.4.3 compared to 3.2.1 #2201
Description
Hi all!
Are there known performance issues with DWAA in OpenEXR 3.4.0 on Linux ?
We have recently upgraded from OpenEXR 3.2.1 and we are seeing 50% performance decreases when writing DWAA images.
There was an issue logged about this in OpenEXR 3.3.1 (#1915), but it seems a fix was merged a while ago to improve DWAA, but do we know if we were actually back on par with previous versions ?
We have tried with the latest main build (4.0) and with TBB threading instead of the internal threading of OpenEXR.
Playing around with the DWAA compression levels and threading levels does not help either. In all cases, each call to Imf::OutputPart::writePixels() takes ~20ms with OpenEXR 3.4.0 and ~10ms in OpenEXR 3.2.1.