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-rw-r--r--crates/ra_prof/src/hprof.rs45
1 files changed, 21 insertions, 24 deletions
diff --git a/crates/ra_prof/src/hprof.rs b/crates/ra_prof/src/hprof.rs
index 2b8a90363..a3f5321fb 100644
--- a/crates/ra_prof/src/hprof.rs
+++ b/crates/ra_prof/src/hprof.rs
@@ -30,8 +30,9 @@ pub fn init_from(spec: &str) {
30pub type Label = &'static str; 30pub type Label = &'static str;
31 31
32/// This function starts a profiling scope in the current execution stack with a given description. 32/// This function starts a profiling scope in the current execution stack with a given description.
33/// It returns a Profile structure and measure elapsed time between this method invocation and Profile structure drop. 33/// It returns a `Profile` struct that measures elapsed time between this method invocation and `Profile` struct drop.
34/// It supports nested profiling scopes in case when this function invoked multiple times at the execution stack. In this case the profiling information will be nested at the output. 34/// It supports nested profiling scopes in case when this function is invoked multiple times at the execution stack.
35/// In this case the profiling information will be nested at the output.
35/// Profiling information is being printed in the stderr. 36/// Profiling information is being printed in the stderr.
36/// 37///
37/// # Example 38/// # Example
@@ -58,36 +59,35 @@ pub type Label = &'static str;
58/// ``` 59/// ```
59pub fn profile(label: Label) -> Profiler { 60pub fn profile(label: Label) -> Profiler {
60 assert!(!label.is_empty()); 61 assert!(!label.is_empty());
61 let enabled = PROFILING_ENABLED.load(Ordering::Relaxed) 62
62 && PROFILE_STACK.with(|stack| stack.borrow_mut().push(label)); 63 if PROFILING_ENABLED.load(Ordering::Relaxed)
63 let label = if enabled { Some(label) } else { None }; 64 && PROFILE_STACK.with(|stack| stack.borrow_mut().push(label))
64 Profiler { label, detail: None } 65 {
66 Profiler(Some(ProfilerImpl { label, detail: None }))
67 } else {
68 Profiler(None)
69 }
65} 70}
66 71
67pub struct Profiler { 72pub struct Profiler(Option<ProfilerImpl>);
68 label: Option<Label>, 73
74struct ProfilerImpl {
75 label: Label,
69 detail: Option<String>, 76 detail: Option<String>,
70} 77}
71 78
72impl Profiler { 79impl Profiler {
73 pub fn detail(mut self, detail: impl FnOnce() -> String) -> Profiler { 80 pub fn detail(mut self, detail: impl FnOnce() -> String) -> Profiler {
74 if self.label.is_some() { 81 if let Some(profiler) = &mut self.0 {
75 self.detail = Some(detail()) 82 profiler.detail = Some(detail())
76 } 83 }
77 self 84 self
78 } 85 }
79} 86}
80 87
81impl Drop for Profiler { 88impl Drop for ProfilerImpl {
82 fn drop(&mut self) { 89 fn drop(&mut self) {
83 match self { 90 PROFILE_STACK.with(|it| it.borrow_mut().pop(self.label, self.detail.take()));
84 Profiler { label: Some(label), detail } => {
85 PROFILE_STACK.with(|stack| {
86 stack.borrow_mut().pop(label, detail.take());
87 });
88 }
89 Profiler { label: None, .. } => (),
90 }
91 } 91 }
92} 92}
93 93
@@ -179,21 +179,18 @@ impl ProfileStack {
179 pub fn pop(&mut self, label: Label, detail: Option<String>) { 179 pub fn pop(&mut self, label: Label, detail: Option<String>) {
180 let start = self.starts.pop().unwrap(); 180 let start = self.starts.pop().unwrap();
181 let duration = start.elapsed(); 181 let duration = start.elapsed();
182 let level = self.starts.len();
183 self.messages.finish(Message { duration, label, detail }); 182 self.messages.finish(Message { duration, label, detail });
184 if level == 0 { 183 if self.starts.is_empty() {
185 let longer_than = self.filter.longer_than; 184 let longer_than = self.filter.longer_than;
186 // Convert to millis for comparison to avoid problems with rounding 185 // Convert to millis for comparison to avoid problems with rounding
187 // (otherwise we could print `0ms` despite user's `>0` filter when 186 // (otherwise we could print `0ms` despite user's `>0` filter when
188 // `duration` is just a few nanos). 187 // `duration` is just a few nanos).
189 if duration.as_millis() > longer_than.as_millis() { 188 if duration.as_millis() > longer_than.as_millis() {
190 let stderr = stderr();
191 if let Some(root) = self.messages.root() { 189 if let Some(root) = self.messages.root() {
192 print(&self.messages, root, 0, longer_than, &mut stderr.lock()); 190 print(&self.messages, root, 0, longer_than, &mut stderr().lock());
193 } 191 }
194 } 192 }
195 self.messages.clear(); 193 self.messages.clear();
196 assert!(self.starts.is_empty())
197 } 194 }
198 } 195 }
199} 196}