Package: xfce4-terminal Version: 0.2.4-7 Severity: normal if the output of a program is a long list of data that does not consist of newlines, xfce terminal will be very slow. gnome terminal gets around this limitation by limiting the scrollback in terms of bytes, rather than line numbers. for example, 1000 lines of scrollback would be limited to something like 80*1000 = 80,000 bytes of scrollback instead of 1000 newlines.
the following code (which computes the largest known prime and outputs that number to stdout; http://fabrice.bellard.free.fr/mersenne.html) is a demonstration of this bug. the output causes xfce terminal to practically grind to a halt. the problem arises because the output contains no newlines. the computation itself only takes about 3 minutes on my 1.6 GHz processor: #!/bin/bash echo '''#include <stdio.h> int m=754974721,N,t[1<<24],a,*p,i,e=30611555,j,s,c,U;f(d){for(s=1<<24;s/=2;d=d* 1LL*d%m)if(s<N)for(p=t;p<t+N;p+=s)for(i=s,c=1;i;i--)a=*p+p[s],p[s]=(m+*p-p[s])*1LL *c%m,*p++=a%m,c=c*1LL*d%m;for(j=0;i<N-1;){for(s=N/2;!((j^=s)&s);s/=2);if(++i<j) a=t[i],t[i]=t[j],t[j]=a;}}main(){*t=2;U=N=1;while(e/=2){N*=2;U=U*1LL*(m+1)/2%m;f (362);for(p=t;p<t+N;p++)*p=*p*1LL**p%m*U%m;f(415027540);for(a=0,p=t;p<t+N;)a+=*p <<(e&1),*p++=a%10,a/=10;}while(!*--p);t[0]--;while(p>=t)printf("%d",*p--);}''' > largest-known-prime.c gcc -o largest-known-prime largest-known-prime.c ../largest-known-prime -- System Information: Debian Release: testing/unstable APT prefers testing APT policy: (600, 'testing'), (500, 'unstable') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.15-1-686 Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1) Versions of packages xfce4-terminal depends on: ii libatk1.0-0 1.10.3-1 The ATK accessibility toolkit ii libc6 2.3.6-3 GNU C Library: Shared libraries an ii libcairo2 1.0.2-3 The Cairo 2D vector graphics libra ii libdbus-1-2 0.61-5 simple interprocess messaging syst ii libdbus-glib-1-2 0.61-5 simple interprocess messaging syst ii libexo-0.3-0 0.3.1.4alpha2-r20235-1 Library with extensions for Xfce ii libfontconfig1 2.3.2-1.1 generic font configuration library ii libfreetype6 2.1.10-1 FreeType 2 font engine, shared lib ii libglib2.0-0 2.10.1-2 The GLib library of C routines ii libgtk2.0-0 2.8.13-1 The GTK+ graphical user interface ii libice6 6.9.0.dfsg.1-4 Inter-Client Exchange library ii libncurses5 5.5-1 Shared libraries for terminal hand ii libpango1.0-0 1.12.0-2 Layout and rendering of internatio ii libpng12-0 1.2.8rel-5 PNG library - runtime ii libsm6 6.9.0.dfsg.1-4 X Window System Session Management ii libstartup-notifi 0.8-1 library for program launch feedbac ii libvte4 1:0.11.20-3 Terminal emulator widget for GTK+ ii libx11-6 6.9.0.dfsg.1-4 X Window System protocol client li ii libxcursor1 1.1.3-1 X cursor management library ii libxext6 6.9.0.dfsg.1-4 X Window System miscellaneous exte ii libxfce4util-1 4.2.3.2-1 Utility functions library for Xfce ii libxfcegui4-3 4.2.3-1 Basic GUI C functions for Xfce4 ii libxft2 2.1.8.2-3 FreeType-based font drawing librar ii libxi6 6.9.0.dfsg.1-4 X Window System Input extension li ii libxinerama1 6.9.0.dfsg.1-4 X Window System multi-head display ii libxrandr2 6.9.0.dfsg.1-4 X Window System Resize, Rotate and ii libxrender1 1:0.9.0.2-1 X Rendering Extension client libra ii zlib1g 1:1.2.3-11 compression library - runtime Versions of packages xfce4-terminal recommends: ii dbus-1-utils 0.23.4-8 simple interprocess messaging syst -- no debconf information -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
