What the Go scheduler does when your goroutine blocks
A blocking syscall costs an OS thread. A blocking network read costs nothing. Measured with 200 goroutines, GOMAXPROCS=2 and a thread count.
Nolan Keir
Gopheria
Go, beneath the surface. Deep dives into the Go runtime, concurrency, performance, and the trade-offs behind clean abstractions.
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All postssync.Pool survives one GC, not two
A pool holding 100 objects lost none across one collection and all 100 across two. Here is the victim cache, and what it costs at 122,000 ops per millisecond.
Escape analysis is not a rule of thumb
The compiler said "does not escape" and the benchmark reported 104 KiB per operation. Both were right. What -gcflags=-m actually tells you.