| commit | 2ea4b81bfc6a041be08fa477321c513249c86bd6 | [log] [tgz] |
|---|---|---|
| author | Tim King <taking@google.com> | Thu Dec 15 20:59:08 2022 -0800 |
| committer | Tim King <taking@google.com> | Tue Jan 31 21:38:46 2023 +0000 |
| tree | 0c236e5a676798f66fb5fa620ddad7e48229032a | |
| parent | 407bbed8c52312cc5c2d55f32d9d0077de0288ce [diff] |
go/ast/inspector: skip ranges that do not contain a node type
Skips inspecting a range of nodes that do not contain any nodes
of a given type. Computes a bitmask of type nodes between push
and pop events. Skips forward to pop if nodes in between cannot
match the type mask.
Benchmarking against previous implementation on "net":
- Preorder filtered by *ast.FuncDecl and *ast.FuncLit
traversal is faster by 11x.
- Preorder filtered by *ast.CallExpr is faster by 10%.
- Unfiltered traveral is 5% slower.
- Constructing events 3% slower.
- Break even for additional computation is 5 *CallExpr
filtered traversals or 1 *Func{Decl,Lit} filtered
traversal.
Change-Id: If4cb566474b84186ff42fb80ed7e1ebb0f692cc2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/458075
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Tim King <taking@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
This repository provides the golang.org/x/tools module, comprising various tools and packages mostly for static analysis of Go programs, some of which are listed below. Use the “Go reference” link above for more information about any package.
It also contains the golang.org/x/tools/gopls module, whose root package is a language-server protocol (LSP) server for Go. An LSP server analyses the source code of a project and responds to requests from a wide range of editors such as VSCode and Vim, allowing them to support IDE-like functionality.
Selected commands:
cmd/goimports formats a Go program like go fmt and additionally inserts import statements for any packages required by the file after it is edited.cmd/callgraph prints the call graph of a Go program.cmd/digraph is a utility for manipulating directed graphs in textual notation.cmd/stringer generates declarations (including a String method) for “enum” types.cmd/toolstash is a utility to simplify working with multiple versions of the Go toolchain.These commands may be fetched with a command such as
go install golang.org/x/tools/cmd/goimports@latest
Selected packages:
go/ssa provides a static single-assignment form (SSA) intermediate representation (IR) for Go programs, similar to a typical compiler, for use by analysis tools.
go/packages provides a simple interface for loading, parsing, and type checking a complete Go program from source code.
go/analysis provides a framework for modular static analysis of Go programs.
go/callgraph provides call graphs of Go programs using a variety of algorithms with different trade-offs.
go/ast/inspector provides an optimized means of traversing a Go parse tree for use in analysis tools.
go/cfg provides a simple control-flow graph (CFG) for a Go function.
go/expect reads Go source files used as test inputs and interprets special comments within them as queries or assertions for testing.
go/gcexportdata and go/gccgoexportdata read and write the binary files containing type information used by the standard and gccgo compilers.
go/types/objectpath provides a stable naming scheme for named entities (“objects”) in the go/types API.
Numerous other packages provide more esoteric functionality.
This repository uses Gerrit for code changes. To learn how to submit changes, 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.
This repository uses prettier to format JS and CSS files.
The version of prettier used is 1.18.2.
It is encouraged that all JS and CSS code be run through this before submitting a change. However, it is not a strict requirement enforced by CI.