I noticed today after sending a job to render with 2.57b that PNG compression is painful. I didn´t notice it before though.
Tried on two machines, same result.
Rendering 1080p with alpha, 5 seconds for a frame, rather simple stuff.
Then ~15 seconds pause, console output tells me file is written, starts next frame on a Phenom2 x4
On my C2Q9550, it takes around 10 seconds.
Took me actually some time to figure out it was the PNG compression. Either it was always set to 0% in 2.49 or it didn´t happen there.
That seems rather unatural. Sure I can store them uncompressed, but I don´t need to waste space just because I have it.
I also often need to send frames via ftp to clients.
However, rendering the image uncompressed (~8MB)
Compressing it in blender to 100% (best compression) -> 15 seconds, 915k
Compressing it in IrfanView to 9 (best compression) -> 0-1 second, 535k (seems instant)
Yes, I can batchcompress all the frames with IrfanView after rendering uncompressed, but thats an unnesessary extra step in the workflow IMO.
Anyone else experiencing it or are just my two systems oddly slow compressing PNG?
Blender seem not to just compress slow, it compresses also bad.
If others experience that as well I´ll check the bugtracker