On 3 July 2010 13:59, Thom Brown <[email protected]> wrote: > On 3 July 2010 03:41, Bruce Momjian <[email protected]> wrote: >> Peter Eisentraut wrote: >>> On fre, 2010-07-02 at 22:15 -0400, Bruce Momjian wrote: >>> > > 500k of source for just half a dozen simple images? There's >>> > something >>> > > seriously wrong there. I suspect the PNGs could be compressed a lot >>> > > more, but right now I'm wondering exactly how verbose the dia >>> > "source" >>> > > representation is. >>> > >>> > Here is the PNG URL: >>> > >>> > http://momjian.us/expire/pgsql-docs/img/ >>> > >>> > and the dia files: >>> > >>> > http://momjian.us/expire/pgsql-docs/dia/ >>> >>> The dia stuff is XML that should compress well. >> >> Gzip takes the dia directory from 526k to 42k. And of course gzip does >> little for the PNG files. >> > > How configurable is the generation process for these PNGs? It's just > that they don't appear to be optimised. > > For example, pgclient_server.png is created at 75,089 bytes, but can > be reduced to 15,643 bytes like in the attached file > (pgclient_server2.png) by using a 16-colour indexed palette. > > Thom >
Being a bit more generous, and using a 32-colour palette, it looks like it yields a typical saving of 75% Original images: 40290 file_based_log_shipping.png 54211 hot_standby.png 52400 page_layout.png 75089 pgclient_server.png 49117 pg_dir_layout.png 17692 pg_lines_code.png 41723 pg_standby.png 25135 pitr.png 10946 postgresql_hist.png 34156 streaming_replication.png 68679 tablespaces.png 18197 vacuum.png TOTAL: 487635 bytes 32-colour palette images (compression %): 10700 file_based_log_shipping2.png (73.44%) 14245 hot_standby2.png (73.72%) 9896 page_layout2.png (81.11%) 13786 pg_dir_layout2.png (81.64%) 6347 pg_lines_code2.png (87.08%) 11211 pg_standby2.png (36.63%) 18173 pgclient_server2.png (56.44%) 7148 pitr2.png (71.56%) 3873 postgresql_hist2.png (64.62%) 8969 streaming_replication2.png (73.74%) 15338 tablespaces2.png (77.67%) 5846 vacuum2.png (67.87%) TOTAL: 125532 bytes (74.26%) ..just an idea anyway. Thom -- Sent via pgsql-docs mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-docs
