improve xtask

xtask/src/main.rs

@@ -239,6 +239,8 @@ fn regression() -> Result<(), DynError> {
     let res = try_regression();
 
     snake.kill().and(prod.kill())?;
+    stop_local_docker()?;
+    stop_production()?;
     let (won, draw, loose) = res?;
     let games = won + draw + loose;
     println!(
@@ -265,7 +267,7 @@ fn try_regression() -> Result<(usize, usize, usize), DynError> {
     const GAMES: usize = 100;
     // limit the parallelism
     rayon::ThreadPoolBuilder::new()
-        .num_threads(std::thread::available_parallelism()?.get() / 8)
+        .num_threads(std::thread::available_parallelism()?.get() / 4)
         .build_global()
         .unwrap();
 
@@ -401,6 +403,13 @@ fn run_local_docker(port: u16) -> Result<Child, DynError> {
     }
 }
 
+fn stop_local_docker() -> Result<(), DynError> {
+    Command::new("docker")
+        .args(["stop", "battlesnake-regression-local"])
+        .status()?;
+    Ok(())
+}
+
 fn run_production(port: u16) -> Result<Child, DynError> {
     let mut snake = Command::new("docker")
         .args([
@@ -431,6 +440,13 @@ fn run_production(port: u16) -> Result<Child, DynError> {
     }
 }
 
+fn stop_production() -> Result<(), DynError> {
+    Command::new("docker")
+        .args(["stop", "battlesnake-regression-production"])
+        .status()?;
+    Ok(())
+}
+
 fn docker() -> Result<(), DynError> {
     if !Command::new("docker")
         .current_dir(project_root())