gnomon
Prepend timestamps to command output
TLDR
Prepend elapsed time to each line of output
$ [command] | gnomon
Show total elapsed time since the command started$ [command] | gnomon --type=elapsed-total
Show absolute timestamps for each line$ [command] | gnomon --type=absolute
Highlight lines taking longer than 1.5 seconds$ [command] | gnomon --high=1.5
Set both high and medium thresholds for color coding$ [command] | gnomon --high=3.0 --medium=1.0
Ignore lines shorter than a threshold$ [command] | gnomon --ignore-blank --high=0.5
SYNOPSIS
gnomon [options]
DESCRIPTION
gnomon is a command-line utility that prepends timestamp information to the output of another command, piped through stdin. By default, it shows how long each line of output took to appear, making it useful for identifying slow steps in build processes, test suites, or log output.The tool color-codes output based on configurable time thresholds: lines exceeding the --high threshold are shown in red, those exceeding --medium in yellow, and the rest in the default color.
PARAMETERS
--type TYPE
Timestamp type: elapsed-line (default), elapsed-total, or absolute.--ignore-blank
Do not prepend timestamps to blank lines.--real-time THRESHOLD
Set a threshold in seconds after which gnomon prints output in real time rather than buffering.--high SECONDS
Threshold in seconds for high (red) time coloring. Default: 1.0.--medium SECONDS
Threshold in seconds for medium (yellow) time coloring. Default: 0.5.--help
Display help information.
INSTALL
sudo pacman -S gnomon
CAVEATS
Requires Node.js and is installed via npm (`npm install -g gnomon`). Adds minor latency to output. Best suited for diagnosing slow processes rather than precise benchmarking.
