f0be937dca
Optimize a few things to speed up deep completions: - item() is slow, so don't call it unless the candidate's name matches the input. - We only end up returning the top 3 deep candidates, so skip deep candidates early if they are not in the top 3 scores we have seen so far. This greatly reduces calls to item(), but also avoids a humongous sort in lsp/completion.go. - Get rid of error return value from found(). Nothing checked for this error, and we spent a lot of time allocating the only possible error "this candidate is not accessible", which is not unexpected to begin with. - Cache the call to types.NewMethodSet in methodsAndFields(). This is relatively expensive and can be called many times for the same type when searching for deep completions. - Avoid calling deepState.chainString() twice by calling it once and storing the result on the candidate. These optimizations sped up my slow completion from 1.5s to 0.5s. There were around 200k deep candidates examined for this one completion. The remaining time is dominated by the fuzzy matcher. Obviously 500ms is still unacceptable under any circumstances, so there will be subsequent improvements to limit the deep completion search scope to make sure we always return completions in a reasonable amount of time. I also made it so there is always a "matcher" set on the completer. This makes the matching logic a bit simpler. Change-Id: Id48ef7031ee1d4ea04515c828277384562b988a8 Reviewed-on: https://go-review.googlesource.com/c/tools/+/190522 Run-TryBot: Rebecca Stambler <rstambler@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org> |
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README.md
Go Tools
This subrepository holds the source for various packages and tools that support the Go programming language.
Some of the tools, godoc and vet for example, are included in binary Go
distributions.
Others, including the Go guru and the test coverage tool, can be fetched with
go get.
Packages include a type-checker for Go and an implementation of the Static Single Assignment form (SSA) representation for Go programs.
Download/Install
The easiest way to install is to run go get -u golang.org/x/tools/.... You can
also manually git clone the repository to $GOPATH/src/golang.org/x/tools.
Report Issues / Send Patches
This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.
The main issue tracker for the tools repository is located at https://github.com/golang/go/issues. Prefix your issue with "x/tools/(your subdir):" in the subject line, so it is easy to find.