Zoom is a low-overhead graphical and command line profiler for Linux.
A Zoom profile is system-wide, precise down to the instruction level, and captures backtraces. This lets you see exactly what was running, where time was spent, and how that code was called. Drill down into critical code to get detailed performance data. Zoom analyzes and annotates your code with specific tuning advice for many compilers and processors. Share what you find with colleagues or archive it for later review. Zoom saves profiles as a single, self-contained session file that can be emailed or attached to bug reports. It also supports remote network profiling and scripting.