I am trying to profile a slow bash script.
I have seen a few methods to do so in this question, but they all give absolute timings, or relative from one line to the next.
I would like to have timings per command / stack, to be able to dig in. A flamegraph is the perfect tool for this, but I'm not sure how I can transform the previous output into a perf-style output that can be ingested by flamegraph tool.
For reference, the current output looks like this:
+ 1679928866.341832 export LANG=en_UK.UTF-8
+ 1679928866.341900 LANG=en_UK.UTF-8
+ 1679928866.341974 test -e /Users/a770pl/.iterm2_shell_integration.bash
+ 1679928866.342025 source /Users/a770pl/.iterm2_shell_integration.bash
++ 1679928866.343111 [[ xterm-256color != screen ]]
++ 1679928866.343142 [[ '' = '' ]]
++ 1679928866.343160 [[ himxBH == *i* ]]
++ 1679928866.343191 ITERM_SHELL_INTEGRATION_INSTALLED=Yes
++ 1679928866.343214 ITERM_PREV_PS1='\h:\W \u\$ '
++ 1679928866.343234 [[ '' == \d\e\f\i\n\e\d ]]
The number of plusses is the depth in the stack, I suppose, then we have the absolute time, then the command being run.
