print top span names

vercel · May 16, 2023 · b284856 · b284856
1 parent aa1887e
commit b284856
Showing 1 changed file with 11 additions and 1 deletion.
diff --git a/crates/turbopack-convert-trace/src/main.rs b/crates/turbopack-convert-trace/src/main.rs
@@ -1,5 +1,5 @@
 use std::{
- cmp::{max, min},
+ cmp::{max, min, Reverse},
  collections::{hash_map::Entry, HashMap, HashSet},
  eprintln,
  ops::Range,
@@ -87,6 +87,7 @@ fn main() {
  }
 
  let mut all_self_times = Vec::new();
+ let mut name_counts: HashMap<&str, usize> = HashMap::new();
 
  for FullTraceRow { ts, data } in trace_rows {
  match data {
@@ -106,6 +107,7 @@ fn main() {
  spans[internal_id].parent = internal_parent;
  let parent = &mut spans[internal_parent];
  parent.items.push(SpanItem::Child(internal_id));
+ *name_counts.entry(name).or_default() += 1;
  }
  TraceRow::End { id } => {
  // id might be reused
@@ -152,6 +154,14 @@ fn main() {
 
  eprintln!(" done ({} spans)", spans.len());
 
+ let mut name_counts: Vec<(&str, usize)> = name_counts.into_iter().collect();
+ name_counts.sort_by_key(|(_, count)| Reverse(*count));
+
+ eprintln!("Top 10 span names:");
+ for (name, count) in name_counts.into_iter().take(10) {
+ eprintln!("{}x {}", count, name);
+ }
+
  println!("[");
  print!(r#"{{"ph":"M","pid":1,"name":"thread_name","tid":0,"args":{{"name":"Single CPU"}}}}"#);
  pjson!(r#"{{"ph":"M","pid":2,"name":"thread_name","tid":0,"args":{{"name":"Scaling CPU"}}}}"#);