Hi Ryan Today Ryan Kubica wrote:
> I'm curious what benchmarks/tracing you do during development to > localize performance bottlenecks in rrdtool graphing. rrdtool graphing relies a lot on services provided by other libraries in the first instance this is cairo / pango, but further down the chain also freetype, libpng and zlib I have used callgrind (part of valgrind) to pinpoint performance issues ... I found that the handling of truetype fonts can easily lead to performance issues, especially on systems with large numbers of fonts available to the fontconfig libraries. I have tried to make sure in rrdtool code that all the caching that available in this regard is employed, but this will only have an effect if you produce multiple charts from the same process Another timesink is the graph compression as mentioned in a previous posst. If you are using xport instead of graph or use graph without actually generating a graph, the perfromance bottlenecks will be different ... (I have not investigated this). I have never looked at RPN processing performance for example, so there might be some easy wins there. As mentioned at the beginnnig, I find callgrind invaluable in this respect cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch t...@oetiker.ch ++41 62 775 9902 / sb: -9900 _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
