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diff --git a/kstartperf/README b/kstartperf/README new file mode 100644 index 00000000..ff986444 --- /dev/null +++ b/kstartperf/README @@ -0,0 +1,31 @@ + +** kstartperf: startup time measurement for KDE apps ** + +** Usage: + +kstartperf measures startup time for KDE applications. Usage is simple: + + $ kstartperf konsole + +will show you the startup time of konsole in milliseconds. + + +** How does it work? + +1. Kstartperf stores the current time with microsecond resolution in an + environment variable ($KSTARTPERF). +2. Kstartperf executes the requested application, but with a LD_PRELOAD + library that overrides the X11 XMapWindow() function. +3. As soon as the app calls XMapWindow (this is the point where we assume + that the app has "started up"), our function is called instead of the + original XMapWindow(). This function calculates the time difference + between the current time and the time stored in the environment variable + and prints this information to standard error. +4. Our function disables itself and calls the original XMapWindow(). + +** Notes + +The appliation that is being profiled, needs to be linked against kdecore. + +Geert Jansen <jansen@kde.org>, +20 July 2000 |