OpenEXR saver thread

Hello, I’m rendering 14000x5260 exr files about 1800 frames.
Because OpenEXR saving is too slow, rendering is pausing every 3 frames. it makes 10hrs renderings to 23hrs…
As far as I know saving OpenEXR is using CPU resources but UE5 uses only 20% even saving 3 frames concurrently.

Two questions arise.

  • I’m using ZIP compression for my other pipeline for fast readout, is it ZIP1 compression not ZIP16?
  • Is there any option for increasing the thread number of OpenEXR? like multiple savers.

Thank you in advance.