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"X-Ray Hotspots with the Git Log A bulletproof X-Ray has to be language aware in the sense your tooling needs to parse the code and understand its syntax. However, there’s a simple shortcut based on Git’s log option that serves as a useful heuristic to count change frequencies and complexity trends of individual functions: Use the -L option to instruct Git to fetch each historic revision based on the range of lines of code that make up a function. You can even specify the name of the function and have Git resolve the line numbers for you. Here’s an example on our Linux hotspot: git log -L:intel_crtc_page_flip:drivers/gpu/drm/i915/intel_display.c."

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