TLDR
Goroutines are one of Go’s most powerful tools, but they’re not a guaranteed performance win. This article benchmarks goroutines on CPU-bound vs I/O-bound workloads to reveal where they shine and where they add costly overhead. The takeaway: use goroutines confidently for I/O-bound tasks, but be cautious with CPU-bound workloads unless multiple cores are available. Concurrency is not the same as parallelism—and knowing the difference is key to writing efficient Go programsvia the TL;DR App
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Written by wisdommatt | Senior Backend Engineer, taming servers for 4+ years; one coffee at a time.
