diff --git a/profiling/src/lib.rs b/profiling/src/lib.rs
index 64c325c335..8fc58fb841 100644
--- a/profiling/src/lib.rs
+++ b/profiling/src/lib.rs
@@ -1,4 +1,3 @@
-use std::thread::current;
 use std::time::Duration;
 use tracing_subscriber::prelude::*;
 use tracing_subscriber::Registry;
@@ -15,7 +14,7 @@ pub use tracing::{info_span, instrument};
 pub struct Profiler {
     #[cfg(feature = "tracing-chrome")]
     /// [`FlushGuard`] must not be dropped until the application scope is dropped for accurate tracing.
-    guard: FlushGuard,
+    _guard: FlushGuard,
 }
 
 pub fn init() -> Profiler {
@@ -45,7 +44,7 @@ pub fn init() -> Profiler {
                         time
                     )
                 })
-                .unwrap_or("trace.json".to_string());
+                .unwrap_or_else(|| "trace.json".to_string());
 
             let path = format!(
                 "{}/{}",
@@ -96,6 +95,6 @@ pub fn init() -> Profiler {
 
     Profiler {
         #[cfg(feature = "tracing-chrome")]
-        guard,
+        _guard: guard,
     }
 }