Unverified50% confidenceFactExact time
A source heatmap aggregates each sampling record by its position in the source code, annotating the number of times each line of code was hit by sampling with color intensity or numeric values, answering which line of code is the most time-consuming, and it requires debug symbols and source maps to restore bytecode instruction positions or line numbers to specific source file lines.
1
Sources
50%
Confidence
Long-term
Relevance
10/13/2026
First Seen
Sources
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