Go team ships goroutine leak profiler that detects blocked channels in production
rseroter · x · 2026-09-04
The Go team introduced Goroutine Leak Profiles (by Vlad Saioc), a new profiler that detects goroutines blocked forever on channels, locks, or I/O—with virtually zero false positives, and it works in production.
- Leaked goroutines inflate memory usage and GC pressure, especially with GOMEMLIMIT.
- Existing tools like goleak and Go 1.25's synctest only cover unit tests, not large-scale production systems.
- The new profiler builds on the pprof profile mechanism to close that gap.
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