Performance
How to read a flame graph without guessing
Width is time, height is call depth, colour means nothing. A practical guide to reading CPU flame graphs from Go's pprof, using a real regression we fixed.
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Go
Go services and workers: profiling with pprof, concurrency, retries and small helpers worth copying.
Go
A retry helper with full jitter, in about 40 lines of Go
Exponential backoff without jitter turns one outage into synchronized waves of retries. Here is a small Go helper that gets backoff, jitter and cancellation right.