diff --git a/Cargo.lock b/Cargo.lock
index a24c27144fee39f15b6ca4f46d79cef6ac46656b..cc72d569f421cd1a97051538e75deded357e8ea2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -20315,6 +20315,7 @@ dependencies = [
  "url",
  "urlencoding",
  "util",
+ "util_macros",
  "uuid",
  "vim",
  "vim_mode_setting",
diff --git a/crates/util/src/paths.rs b/crates/util/src/paths.rs
index 18b8a9ccb0628834b664dfaf2aec622e476cb4ff..085b8b74cb67baf6082fd648a80cb12da9c561ee 100644
--- a/crates/util/src/paths.rs
+++ b/crates/util/src/paths.rs
@@ -858,8 +858,9 @@ pub fn compare_paths(
 #[cfg(test)]
 mod tests {
     use super::*;
+    use util_macros::perf;
 
-    #[test]
+    #[perf]
     fn compare_paths_with_dots() {
         let mut paths = vec![
             (Path::new("test_dirs"), false),
@@ -897,7 +898,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     fn compare_paths_with_same_name_different_extensions() {
         let mut paths = vec![
             (Path::new("test_dirs/file.rs"), true),
@@ -919,7 +920,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     fn compare_paths_case_semi_sensitive() {
         let mut paths = vec![
             (Path::new("test_DIRS"), false),
@@ -951,7 +952,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     fn path_with_position_parse_posix_path() {
         // Test POSIX filename edge cases
         // Read more at https://en.wikipedia.org/wiki/Filename
@@ -1038,7 +1039,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     #[cfg(not(target_os = "windows"))]
     fn path_with_position_parse_posix_path_with_suffix() {
         assert_eq!(
@@ -1094,7 +1095,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     #[cfg(target_os = "windows")]
     fn path_with_position_parse_windows_path() {
         assert_eq!(
@@ -1116,7 +1117,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     #[cfg(target_os = "windows")]
     fn path_with_position_parse_windows_path_with_suffix() {
         assert_eq!(
@@ -1229,7 +1230,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     fn test_path_compact() {
         let path: PathBuf = [
             home_dir().to_string_lossy().to_string(),
@@ -1244,7 +1245,7 @@ mod tests {
         }
     }
 
-    #[test]
+    #[perf]
     fn test_extension_or_hidden_file_name() {
         // No dots in name
         let path = Path::new("/a/b/c/file_name.rs");
@@ -1267,7 +1268,7 @@ mod tests {
         assert_eq!(path.extension_or_hidden_file_name(), Some("eslintrc.js"));
     }
 
-    #[test]
+    #[perf]
     fn edge_of_glob() {
         let path = Path::new("/work/node_modules");
         let path_matcher =
@@ -1278,7 +1279,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     fn project_search() {
         let path = Path::new("/Users/someonetoignore/work/zed/zed.dev/node_modules");
         let path_matcher =
@@ -1289,7 +1290,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     #[cfg(target_os = "windows")]
     fn test_sanitized_path() {
         let path = Path::new("C:\\Users\\someone\\test_file.rs");
@@ -1307,7 +1308,7 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     fn test_compare_numeric_segments() {
         // Helper function to create peekable iterators and test
         fn compare(a: &str, b: &str) -> Ordering {
@@ -1375,7 +1376,7 @@ mod tests {
         assert_eq!(b_iter.collect::<String>(), "def");
     }
 
-    #[test]
+    #[perf]
     fn test_natural_sort() {
         // Basic alphanumeric
         assert_eq!(natural_sort("a", "b"), Ordering::Less);
@@ -1429,7 +1430,7 @@ mod tests {
         assert_eq!(natural_sort("File_a1", "File_A1"), Ordering::Less);
     }
 
-    #[test]
+    #[perf]
     fn test_compare_paths() {
         // Helper function for cleaner tests
         fn compare(a: &str, is_a_file: bool, b: &str, is_b_file: bool) -> Ordering {
@@ -1515,8 +1516,9 @@ mod tests {
         );
     }
 
-    #[test]
+    #[perf]
     fn test_natural_sort_case_sensitivity() {
+        std::thread::sleep(std::time::Duration::from_millis(100));
         // Same letter different case - lowercase should come first
         assert_eq!(natural_sort("a", "A"), Ordering::Less);
         assert_eq!(natural_sort("A", "a"), Ordering::Greater);
@@ -1534,7 +1536,7 @@ mod tests {
         assert_eq!(natural_sort("a", "B"), Ordering::Less);
     }
 
-    #[test]
+    #[perf]
     fn test_natural_sort_with_numbers() {
         // Basic number ordering
         assert_eq!(natural_sort("file1", "file2"), Ordering::Less);
@@ -1612,7 +1614,7 @@ mod tests {
         assert_eq!(natural_sort("file1", "File2"), Ordering::Less);
     }
 
-    #[test]
+    #[perf]
     fn test_natural_sort_edge_cases() {
         // Empty strings
         assert_eq!(natural_sort("", ""), Ordering::Equal);
diff --git a/crates/zed/Cargo.toml b/crates/zed/Cargo.toml
index c550669479e204e15e6647bb211743e17acfc89d..df1445c24cb8354847b2dc72e7bc201065be8a51 100644
--- a/crates/zed/Cargo.toml
+++ b/crates/zed/Cargo.toml
@@ -189,6 +189,7 @@ project = { workspace = true, features = ["test-support"] }
 terminal_view = { workspace = true, features = ["test-support"] }
 tree-sitter-md.workspace = true
 tree-sitter-rust.workspace = true
+util_macros.workspace = true
 workspace = { workspace = true, features = ["test-support"] }
 
 [package.metadata.bundle-dev]
diff --git a/docs/src/development.md b/docs/src/development.md
index 046d515fede061160eff9c4a4bcb7cd1cd63b09e..6cb5f0b8271ab0347d33ee0cf634b60e790f3ba0 100644
--- a/docs/src/development.md
+++ b/docs/src/development.md
@@ -79,6 +79,12 @@ Here's a typical workflow for comparing frame rendering performance between diff
 
 The `script/histogram` tool can accept as many measurement files as you like and will generate a histogram visualization comparing the frame rendering performance data between the provided versions.
 
+### Using `util_macros::perf`
+
+For benchmarking unit tests, annotate them with the `#[perf]` attribute from the `util_macros` crate. Then run `cargo
+perf-test -p $CRATE` to benchmark them. See the rustdoc documentation on `crates/util_macros` and `tooling/perf` for
+in-depth examples and explanations.
+
 ## Contributor links
 
 - [CONTRIBUTING.md](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md)
diff --git a/tooling/perf/src/lib.rs b/tooling/perf/src/lib.rs
index c6d620aaeb45064231fea0baaae02b7b0185e3d5..639e1afde34a69b9d4f4bbca0713e973d80edec2 100644
--- a/tooling/perf/src/lib.rs
+++ b/tooling/perf/src/lib.rs
@@ -1,5 +1,7 @@
 //! Some constants and datatypes used in the Zed perf profiler. Should only be
 //! consumed by the crate providing the matching macros.
+//!
+//! For usage documentation, see the docs on this crate's binary.
 
 use collections::HashMap;
 use serde::{Deserialize, Serialize};
@@ -274,7 +276,7 @@ impl Output {
                         continue;
                     };
                     let shift =
-                        (s_timings.iters_per_sec(s_iters) / o_timings.iters_per_sec(o_iters)) - 1.;
+                        (o_timings.iters_per_sec(o_iters) / s_timings.iters_per_sec(s_iters)) - 1.;
                     if shift > max {
                         max = shift;
                     }
diff --git a/tooling/perf/src/main.rs b/tooling/perf/src/main.rs
index d5be1a9d8a32980cf42cd08f8810ca9aa4ff2631..a9f932d4fa18b712c9f277a80c2370ecceb4b1a3 100644
--- a/tooling/perf/src/main.rs
+++ b/tooling/perf/src/main.rs
@@ -218,7 +218,10 @@ fn compare_profiles(args: &[String]) {
     let ident_new = args.first().expect("FATAL: missing identifier for new run");
     let ident_old = args.get(1).expect("FATAL: missing identifier for old run");
     let wspace_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();
-    let runs_dir = PathBuf::from(&wspace_dir).join(consts::RUNS_DIR);
+    let runs_dir = PathBuf::from(&wspace_dir)
+        .join("..")
+        .join("..")
+        .join(consts::RUNS_DIR);
 
     // Use the blank outputs initially, so we can merge into these with prefixes.
     let mut outputs_new = Output::blank();