perf(lsp): instrument all ops with performance marks (#21536)

Adds performance measurements for all ops used by the LSP. Also changes
output of "Language server status" page to include more precise
information.

Current suspicion is that computing "script version" takes a long time
for some users.

1 files changed, 24 insertions, 1 deletions

diff --git a/cli/lsp/performance.rs b/cli/lsp/performance.rs
index ffb6ed217..610e18067 100644
--- a/cli/lsp/performance.rs
+++ b/cli/lsp/performance.rs
@@ -51,7 +51,12 @@ pub struct PerformanceMeasure {
 
 impl fmt::Display for PerformanceMeasure {
   fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-    write!(f, "{} ({}ms)", self.name, self.duration.as_millis())
+    write!(
+      f,
+      "{} ({}ms)",
+      self.name,
+      self.duration.as_micros() as f64 / 1000.0
+    )
   }
 }
 
@@ -132,6 +137,24 @@ impl Performance {
       .collect()
   }
 
+  pub fn averages_as_f64(&self) -> Vec<(String, u32, f64)> {
+    let mut averages: HashMap<String, Vec<Duration>> = HashMap::new();
+    for measure in self.measures.lock().iter() {
+      averages
+        .entry(measure.name.clone())
+        .or_default()
+        .push(measure.duration);
+    }
+    averages
+      .into_iter()
+      .map(|(k, d)| {
+        let count = d.len() as u32;
+        let a = d.into_iter().sum::<Duration>() / count;
+        (k, count, a.as_micros() as f64 / 1000.0)
+      })
+      .collect()
+  }
+
   fn mark_inner<S: AsRef<str>, V: Serialize>(
     &self,
     name: S,