Sometimes to get good speedup you just need to read the code, thanks @ignaciohagopian #golang twitter.com/ignaciohagopia…

Two low-hanging fruit optimizations in strings.Replace that allows double-digit speedup and memory saving in the existing reference benchmark. #golang #performance go-review.googlesource.com/c/go/+/343089

This past summer, @markgritter spend 25 days battling the Go garbage collector—and emerged victorious. Good news: WE DID NOT HAVE TO REWRITE OUR CLIENT IN RUST. 🙅🏻‍♀️🦀 Read this post for Mark's epic journey to reducing the multi-gigabyte memory spikes. a…

Here’s how we went from using 1400KB of RAM per repo to just 310KB without affecting latency.

As discussed in #33283, Go's implementation or valueCtx.Value is recursive which means that the cost grows linearly with the depth of the context chain. But one issue not discussed there is tha...

A story in 3 acts

Tailscale on iOS runs as a special kind of app, a Network Extension. This lets us run in the background, so we can secure traffic from all of your applications, without them having to change anything. But with this power comes a memory straightjacket. Normal…

This is an umbrella issue for supporting feedback-guided optimization. This has been discussed offhand in a few other contexts (inlining decisions: #17566, code layout decisions: #20356, language c...

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@felixge I know VS Code enables you to run > "Go: Toggle gc details" to see some more details, but nothing like this - though it would be cool!

cmd/benchstat: new version of benchstat Remember that if you're doing benchmarking, use benchstat instead of benchcmp. #golang go-review.googlesource.com/c/perf/+/30996…

Here's a list of some changes to look forward to in #golang 1.18! The first beta should be out in a month, and the final release in three months. Each change with a link, so you can read more.

The compiler currently compiles a+b+c+d as a+(b+(c+d)). It should use (a+b)+(c+d) instead, because the latter can be executed out of order. More broadly, we should balance trees of associative comp...

I run this bot to collect benchmarks; anyone who's watching Go-1.18 release, we (MK) shrank the starting heap size, which is superficially good, but lots of small benchmarks ran entirely within the old initial heap and now they don't -- our metrics went kerflooie.…

Google's Go compiler and runtime team meets periodically (roughly weekly) to discuss ongoing development of the compiler and runtime. While not open to the public, there's been desire by th...

Using go devel +ed4a27a Currently, functions with for-loops are not inline-able, would be nice if they did. Not long ago, I used a non-idiomatic goto in order to cheat around the inliner. @dr2chase

$ go version go version devel go1.17-dc00dc6c6b Thu Jun 10 12:41:37 2021 +0000 linux/amd64 Issue #38184 seems to be a reasonably hard limit in the race detector library, but it's not always...

What version of Go are you using (go version)? $ go version go version go1.18beta1 windows/amd64 Does this issue reproduce with the latest release? It reproduces on the 1.18 Beta 1 release. What op...