Heyla, a couple of days ago I checked into CVS an optimisation which will significantly improve performance for simple rxvt windows, i.e. not using transparency or pixmaps. I've found it very noticeable with network displays with some servers. From an inspection of code, versions 2.6.2 and up will definitely have this problem. Prior versions _may_ not. Here are some benchmarks of performance of some rxvt versions. I've included benchmarks for xterm but the tests are probably biased towards rxvt features (hard and fast scrolling) so take care when interpreting xterm times. I've also included memory usage figures obtained at the end of each run. It's possible to bias data so that with several thousand scrollback lines rxvt 2.21 versions and prior will use less memory than the current version. I consider that as very unlikely in normal usage and haven't produce final memory figures for that case. This is a limited benchmark: it's been run on x86 series processors. Other processor architectures may produce quite different results. There are 4 sets of figures. Local displays using no scrollback lines, 64 scrollback lines (the default for rxvt and xterm), and 2000 scrollback lines. And a network display using no scrollback lines (the point here is to demonstrate output speed rather than internal manipulation of scrollback data which rxvt 2.21 and prior suffer from significantly). Regards, Geoff ====================================================================== ====================================================================== Local machine: 200MHz Pentium NetBSD (XFree86 3.3.6) Remote machine: Dual 233MHz PentiumII Win2000 (StarNet X-Win 5.1.1) xterm version: XFree86 4.0.2(150) rxvt-2.7.5 (--enable-everything) rxvt-20010321 snapshot 2001/03/21 (--enable-everything --enable-strings) rxvt-minimal snapshot 2001/03/21 () my base sizes: text data bss dec hex filename 162773 15432 11552 189757 2e53d /usr/X11R6/bin/xterm 72431 1444 3616 77491 12eb3 /usr/X11R6/bin/rxvt-2.21a5 104568 1040 728 106336 19f60 /usr/X11R6/bin/rxvt-2.7.5 103116 996 696 104808 19968 /usr/X11R6/bin/rxvt 60801 768 672 62241 f321 /usr/X11R6/bin/rxvt-minimal Notes: from memory, it's possible to produce a rxvt-2.21 binary which uses about the same _base_ amount as the minimal version from a current snapshot. However, if you add in all the features for that version you use around 20k more and you're still missing lots of features the current version has. ====================================================================== hard and fast scrolling. 10000 lines. 0 scrollback lines. local display: xterm 3.12s user 0.93s system 39% cpu 10.265 total xterm 3.09s user 0.82s system 38% cpu 10.202 total xterm 3.19s user 0.80s system 38% cpu 10.393 total xterm 3.07s user 1.00s system 39% cpu 10.329 total xterm 3.07s user 0.95s system 40% cpu 9.939 total rxvt-2.21a5 2.13s user 0.59s system 29% cpu 9.370 total rxvt-2.21a5 2.57s user 0.60s system 33% cpu 9.541 total rxvt-2.21a5 2.55s user 0.71s system 33% cpu 9.781 total rxvt-2.21a5 2.24s user 0.63s system 30% cpu 9.468 total rxvt-2.21a5 2.23s user 0.68s system 30% cpu 9.582 total rxvt-2.7.5 2.03s user 0.69s system 35% cpu 7.557 total rxvt-2.7.5 2.34s user 0.66s system 30% cpu 9.887 total rxvt-2.7.5 2.18s user 0.71s system 29% cpu 9.658 total rxvt-2.7.5 2.37s user 0.64s system 28% cpu 10.715 total rxvt-2.7.5 2.18s user 0.70s system 30% cpu 9.588 total rxvt-20010321 1.53s user 0.76s system 46% cpu 4.877 total rxvt-20010321 1.64s user 0.75s system 45% cpu 5.234 total rxvt-20010321 1.70s user 0.71s system 46% cpu 5.216 total rxvt-20010321 1.61s user 0.76s system 46% cpu 5.143 total rxvt-20010321 1.66s user 0.66s system 44% cpu 5.190 total USER VSZ RSS COMMAND root 384 2100 xterm gcw 252 1340 rxvt-2.21a5 gcw 292 1480 rxvt-2.7.5 gcw 292 1492 rxvt-20010321 gcw 168 1232 rxvt-minimal ====================================================================== hard and fast scrolling. 10000 lines. 64 scrollback lines: local display: xterm 3.26s user 0.95s system 40% cpu 10.398 total xterm 3.38s user 0.86s system 40% cpu 10.493 total xterm 3.16s user 0.94s system 27% cpu 15.077 total xterm 3.38s user 1.10s system 42% cpu 10.537 total xterm 3.30s user 1.00s system 40% cpu 10.705 total rxvt-2.21a5 6.35s user 0.72s system 24% cpu 28.995 total rxvt-2.21a5 7.33s user 0.57s system 21% cpu 36.004 total rxvt-2.21a5 7.01s user 0.59s system 25% cpu 29.460 total rxvt-2.21a5 8.22s user 0.63s system 28% cpu 30.885 total rxvt-2.21a5 9.03s user 0.65s system 30% cpu 32.019 total rxvt-2.7.5 2.22s user 0.66s system 28% cpu 9.979 total rxvt-2.7.5 2.05s user 0.85s system 30% cpu 9.640 total rxvt-2.7.5 1.97s user 0.73s system 30% cpu 8.764 total rxvt-2.7.5 2.26s user 0.67s system 30% cpu 9.535 total rxvt-2.7.5 2.24s user 0.59s system 28% cpu 9.770 total rxvt-20010321 1.72s user 0.70s system 47% cpu 5.069 total rxvt-20010321 1.86s user 0.55s system 45% cpu 5.248 total rxvt-20010321 1.85s user 0.60s system 46% cpu 5.265 total rxvt-20010321 1.81s user 0.62s system 47% cpu 5.078 total rxvt-20010321 1.80s user 0.65s system 47% cpu 5.172 total USER VSZ RSS COMMAND root 400 2116 xterm gcw 280 1368 rxvt-2.21a5 gcw 304 1492 rxvt-2.7.5 gcw 304 1504 rxvt-20010321 gcw 192 1260 rxvt-minimal ====================================================================== hard and fast scrolling. 10000 lines. 2000 scrollback lines: local display: xterm 16.96s user 0.96s system 73% cpu 24.229 total xterm 13.72s user 1.39s system 70% cpu 21.471 total xterm 14.53s user 0.94s system 70% cpu 21.903 total xterm 13.77s user 1.34s system 69% cpu 21.656 total rxvt-2.21a5 155.13s user 0.74s system 81% cpu 3:10.96 total rxvt-2.21a5 150.26s user 0.90s system 80% cpu 3:07.39 total rxvt-2.21a5 153.43s user 1.05s system 81% cpu 3:09.44 total rxvt-2.21a5 158.72s user 0.83s system 86% cpu 3:03.90 total rxvt-2.7.5 7.50s user 0.78s system 53% cpu 15.611 total rxvt-2.7.5 5.72s user 0.66s system 46% cpu 13.577 total rxvt-2.7.5 6.55s user 0.77s system 50% cpu 14.567 total rxvt-2.7.5 6.11s user 0.71s system 49% cpu 13.672 total rxvt-20010321 6.17s user 0.70s system 70% cpu 9.785 total rxvt-20010321 6.93s user 0.68s system 72% cpu 10.547 total rxvt-20010321 5.31s user 0.68s system 67% cpu 8.835 total rxvt-20010321 5.74s user 0.82s system 69% cpu 9.437 total USER VSZ RSS COMMAND root 1048 2764 xterm gcw 1048 2136 rxvt-2.21a5 gcw 1068 2256 rxvt-2.7.5 gcw 1068 2268 rxvt-20010321 gcw 952 2020 rxvt-minimal ====================================================================== hard and fast scrolling. 10000 lines. 0 scrollback lines: remote display: xterm 2.45s user 2.03s system 28% cpu 15.946 total xterm 2.58s user 1.85s system 27% cpu 15.944 total xterm 2.67s user 1.88s system 27% cpu 16.467 total xterm 2.67s user 1.89s system 27% cpu 16.869 total xterm 2.73s user 1.76s system 29% cpu 15.417 total rxvt-2.21a5 2.36s user 0.64s system 24% cpu 12.314 total rxvt-2.21a5 2.60s user 0.73s system 27% cpu 12.286 total rxvt-2.21a5 2.75s user 0.65s system 27% cpu 12.390 total rxvt-2.21a5 3.13s user 0.70s system 31% cpu 12.208 total rxvt-2.21a5 3.17s user 0.87s system 32% cpu 12.427 total rxvt-2.7.5 2.48s user 0.75s system 10% cpu 30.274 total rxvt-2.7.5 2.48s user 0.71s system 10% cpu 31.191 total rxvt-2.7.5 2.45s user 0.77s system 10% cpu 31.065 total rxvt-2.7.5 2.29s user 0.73s system 9% cpu 31.332 total rxvt-2.7.5 2.38s user 0.88s system 10% cpu 31.312 total rxvt-20010321 1.44s user 0.81s system 31% cpu 7.200 total rxvt-20010321 1.68s user 0.59s system 30% cpu 7.420 total rxvt-20010321 1.72s user 0.58s system 31% cpu 7.293 total rxvt-20010321 1.79s user 0.53s system 31% cpu 7.323 total rxvt-20010321 1.87s user 0.77s system 36% cpu 7.145 total ====================================================================== -- Geoff Wing : <[EMAIL PROTECTED]> Rxvt Stuff : <[EMAIL PROTECTED]> Zsh Stuff : <[EMAIL PROTECTED]>
