Show whether a task is blocking the main thread

Cargo.toml

@@ -2,7 +2,7 @@
 
 [package]
 name = "tracing-durations-export"
-version = "0.1.2"
+version = "0.2.0"
 edition = "2021"
 description = "Record and visualize parallelism of tracing spans"
 license = "MIT OR Apache-2.0"

Changelog.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.2.0
+
+* Show whether an active span is running on and blocking the main thread or whether it's running in a threadpool with `tokio::task::spawn_blocking`. `--color-top`/`color_top` gets split into two colors, color top main and color top threadpool. The former is used when the task is running on the main thread, the latter is used when it's offloaded to the threadpool. 
+* Colorblind friendly default colors (http://www.cookbook-r.com/Graphs/Colors_(ggplot2)/#a-colorblind-friendly-palette):
+  * color top blocking: #E69F0088
+  * color top threadpool: #56B4E988
+  * color bottom: #E69F0088
+
 ## 0.1.2
 
 * Add `--inline-field` / `inline_field` option: If the is only one field, display its value inline. Since the text is not limited to its box, text can overlap and become unreadable.

Readme.md

@@ -60,6 +60,7 @@ and open `traces.svg`.
 For the plots at the beginning of the readme:
 
 ```shell
+TRACING_DURATION_EXPORT=examples/cached_network.ndjson cargo run --example cached_network
 cargo run --bin plot --features plot --features cli -- examples/cached_network.ndjson
 cargo run --bin plot --features plot --features cli -- --multi-lane examples/cached_network.ndjson --output examples/cached_network_multi_lane.svg
 ```

examples/cached_network.rs

@@ -59,7 +59,7 @@ async fn cached_network_request(api: &str, id: usize) -> String {
 
 #[tokio::main]
 async fn main() {
-    let (duration_layer, _guard) = if let Ok(location) = env::var("TRACING_DURATION_FILE") {
+    let (duration_layer, _guard) = if let Ok(location) = env::var("TRACING_DURATION_EXPORT") {
         let (layer, guard) = DurationsLayerBuilder::default()
             .durations_file(location)
             .build()