Alexey Dolotov 026ec74dfd Reduce per-connection memory overhead ...

- Use sync.Pool for relay buffers instead of stack-allocated arrays.
  A [16379]byte on the goroutine stack forces Go to grow it to 32KB
  (next power of two). Pooled buffers keep goroutine stacks small.

- Same fix for doppelganger write buffer ([16384]byte in conn.start).

- Replace idle goroutines with context.AfterFunc in proxy.ServeConn
  and relay.Relay. These goroutines existed only to wait on ctx.Done()
  and close connections. AfterFunc achieves the same without allocating
  a goroutine until the context is actually cancelled.

Net effect: at 3000 concurrent connections on a 1-vCPU/961MB VPS,
the unmodified binary drops 246 connections and falls to 10 MB/s.
With these changes: zero failures, 63 MB/s, 31% lower RSS.

Closes #412

2026-03-28 13:24:39 +03:00

..

init_test.go

More idioms related to go 1.26

2026-02-17 23:38:12 +01:00

init.go

Decrease relay buffer size

2026-03-14 14:06:48 +01:00

relay_test.go

Remove all cleverness that broke uploads

2021-12-03 07:39:45 +03:00

relay.go

Reduce per-connection memory overhead

2026-03-28 13:24:39 +03:00