I’ve recently been using memray, a memory profiler for Python, to optimize the startup memory usage (and time) for a client. It’s a fantastic tool, but its flexibility hampers getting instant feedback. It takes three commands to profile a program, generate a flame graph from the profile, and open the flame graph in the browser

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Adam Johnson

Zsh glob qualifiers like (om[1]) can select the most recently modified file matching a pattern, eliminating the need to copy generated filenames between commands. The qualifier 'o' sorts matches, 'm' orders by modification time (newest first), and '[1]' selects only the first result. This technique streamlines workflows involving tools like memray that generate files with unpredictable names (like process IDs), allowing multi-step processes to be combined into efficient one-liners.

Zsh: select generated files with (om[1]) glob qualifiers