diff --git a/compiler/rustc_log/src/lib.rs b/compiler/rustc_log/src/lib.rs
index e7b80c64184bf..0debfcc86dc12 100644
--- a/compiler/rustc_log/src/lib.rs
+++ b/compiler/rustc_log/src/lib.rs
@@ -82,8 +82,6 @@ pub fn init_env_logger(env: &str) -> Result<(), Error> {
         .with_verbose_exit(verbose_entry_exit)
         .with_verbose_entry(verbose_entry_exit)
         .with_indent_amount(2);
-    #[cfg(all(parallel_compiler, debug_assertions))]
-    let layer = layer.with_thread_ids(true).with_thread_names(true);
 
     let subscriber = tracing_subscriber::Registry::default().with(filter).with(layer);
     match env::var(format!("{env}_BACKTRACE")) {
diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs
index e5fdac3ceda7b..5ca2cf4c5e316 100644
--- a/src/bootstrap/config.rs
+++ b/src/bootstrap/config.rs
@@ -1429,7 +1429,7 @@ impl Config {
             set(&mut config.use_lld, rust.use_lld);
             set(&mut config.lld_enabled, rust.lld);
             set(&mut config.llvm_tools_enabled, rust.llvm_tools);
-            config.rustc_parallel = rust.parallel_compiler.unwrap_or(false);
+            config.rustc_parallel = rust.parallel_compiler.unwrap_or(true);
             config.rustc_default_linker = rust.default_linker;
             config.musl_root = rust.musl_root.map(PathBuf::from);
             config.save_toolstates = rust.save_toolstates.map(PathBuf::from);