1 use std::{fmt, iter::FromIterator, sync::Arc};
4 salsa::debug::{DebugQueryTable, TableEntry},
5 CrateId, FileId, FileTextQuery, SourceDatabase, SourceRootId,
9 symbol_index::{LibrarySymbolsQuery, SymbolIndex},
12 use itertools::Itertools;
13 use profile::{memory_usage, Bytes};
14 use rustc_hash::FxHashMap;
16 use syntax::{ast, Parse, SyntaxNode};
18 fn syntax_tree_stats(db: &RootDatabase) -> SyntaxTreeStats {
19 base_db::ParseQuery.in_db(db).entries::<SyntaxTreeStats>()
21 fn macro_syntax_tree_stats(db: &RootDatabase) -> SyntaxTreeStats {
22 hir::db::ParseMacroQuery.in_db(db).entries::<SyntaxTreeStats>()
27 // Shows internal statistic about memory usage of rust-analyzer.
30 // | Editor | Action Name
32 // | VS Code | **Rust Analyzer: Status**
34 pub(crate) fn status(db: &RootDatabase, file_id: Option<FileId>) -> String {
35 let mut buf = String::new();
36 format_to!(buf, "{}\n", FileTextQuery.in_db(db).entries::<FilesStats>());
37 format_to!(buf, "{}\n", LibrarySymbolsQuery.in_db(db).entries::<LibrarySymbolsStats>());
38 format_to!(buf, "{}\n", syntax_tree_stats(db));
39 format_to!(buf, "{} (macros)\n", macro_syntax_tree_stats(db));
40 format_to!(buf, "{} total\n", memory_usage());
42 if let Some(file_id) = file_id {
43 format_to!(buf, "\nfile info:\n");
44 let krate = crate::parent_module::crate_for(db, file_id).pop();
47 let crate_graph = db.crate_graph();
48 let display_crate = |krate: CrateId| match &crate_graph[krate].display_name {
49 Some(it) => format!("{}({:?})", it, krate),
50 None => format!("{:?}", krate),
52 format_to!(buf, "crate: {}\n", display_crate(krate));
53 let deps = crate_graph[krate]
56 .map(|dep| format!("{}={:?}", dep.name, dep.crate_id))
58 format_to!(buf, "deps: {}\n", deps);
60 None => format_to!(buf, "does not belong to any crate"),
72 impl fmt::Display for FilesStats {
73 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
74 write!(fmt, "{} ({}) files", self.total, self.size)
78 impl FromIterator<TableEntry<FileId, Arc<String>>> for FilesStats {
79 fn from_iter<T>(iter: T) -> FilesStats
81 T: IntoIterator<Item = TableEntry<FileId, Arc<String>>>,
83 let mut res = FilesStats::default();
86 res.size += entry.value.unwrap().len();
93 pub(crate) struct SyntaxTreeStats {
95 pub(crate) retained: usize,
98 impl fmt::Display for SyntaxTreeStats {
99 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
100 write!(fmt, "{} trees, {} retained", self.total, self.retained)
104 impl FromIterator<TableEntry<FileId, Parse<ast::SourceFile>>> for SyntaxTreeStats {
105 fn from_iter<T>(iter: T) -> SyntaxTreeStats
107 T: IntoIterator<Item = TableEntry<FileId, Parse<ast::SourceFile>>>,
109 let mut res = SyntaxTreeStats::default();
112 res.retained += entry.value.is_some() as usize;
118 impl<M> FromIterator<TableEntry<MacroFile, Option<(Parse<SyntaxNode>, M)>>> for SyntaxTreeStats {
119 fn from_iter<T>(iter: T) -> SyntaxTreeStats
121 T: IntoIterator<Item = TableEntry<MacroFile, Option<(Parse<SyntaxNode>, M)>>>,
123 let mut res = SyntaxTreeStats::default();
126 res.retained += entry.value.is_some() as usize;
133 struct LibrarySymbolsStats {
138 impl fmt::Display for LibrarySymbolsStats {
139 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
140 write!(fmt, "{} ({}) index symbols", self.total, self.size)
144 impl FromIterator<TableEntry<(), Arc<FxHashMap<SourceRootId, SymbolIndex>>>>
145 for LibrarySymbolsStats
147 fn from_iter<T>(iter: T) -> LibrarySymbolsStats
149 T: IntoIterator<Item = TableEntry<(), Arc<FxHashMap<SourceRootId, SymbolIndex>>>>,
151 let mut res = LibrarySymbolsStats::default();
153 let value = entry.value.unwrap();
154 for symbols in value.values() {
155 res.total += symbols.len();
156 res.size += symbols.memory_size();