Go

Four months, one service rewrite, the wins were not the ones I expected and the costs were larger than I thought

A nil deref in a background worker crashed our whole service because Go's panic model doesn't care that you spawned a goroutine to handle errors safely

A small helper to cancel a slow read with a deadline, using context and a goroutine proxy.

A checklist of the settings I reach for when a Go service needs to talk to an upstream that's... not great

Conditional compilation in Go via build tags is simpler than most preprocessor systems and I use it more than I expected

After years of churn, the error handling style that has held up across three services and five engineers

What I use generics for, what I don't, and the subtle ways they interact with method sets and interfaces

A short operational guide to resolving go.mod and go.sum conflicts without making the problem worse

GOMEMLIMIT is the Go runtime environment variable I wish I'd known about a year earlier

Most Go HTTP tests I see are mocked when they should be using httptest.Server, and it shows

A collection of ways I made Go benchmarks lie to me, including the compiler optimizations I didn't know existed

Short reads, partial reads, and the difference between Read and ReadFull took me far too long to get right

Converting a concrete type to an interface is not free, and in hot paths it can account for a startling share of GC pressure

A CPU profile pointed at a line with a simple map lookup, and pprof's disasm view sent me down a real rabbit hole

A long rant about what sync.Pool actually guarantees, when it helps, and when it just gives you the illusion of helping