[Gdal-dev] ECW compression - Extremely slow Linux performance

[Mark Overmeer]

> Andrew Larcombe wrote:
> >I'm using gdal_translate to convert a 4000px x 4000px uncompressed 46MB 
> >tiff to an ECW file.

* Frank Warmerdam (warmerdam at pobox.com) [060818 16:38]:
> Have you watched the CPU usage to see if it is 100% on the linux system
> when doing the compression?  If not, then I *suspect* some sort of thread
> switching latency or something similar.

I have seen this as well (tried many generations of Linux kernels)  An
strace() showed me that the library waits upto 10ms per (what I guess)
image line.  At the same time, the TARGET has no affect at all.  It
seems mutulated on purpose.
-- 
CU,
               MarkOv