diff --git a/cli/bench/main.rs b/cli/bench/main.rs
index 3e7cc61fc0..e4cbf3eda9 100644
--- a/cli/bench/main.rs
+++ b/cli/bench/main.rs
@@ -162,7 +162,7 @@ const RESULT_KEYS: &[&str] =
 fn run_exec_time(
   deno_exe: &Path,
   target_dir: &Path,
-) -> Result<HashMap<String, HashMap<String, i64>>> {
+) -> Result<HashMap<String, HashMap<String, f64>>> {
   let hyperfine_exe = test_util::prebuilt_tool_path("hyperfine");
 
   let benchmark_file = target_dir.join("hyperfine_results.json");
@@ -203,7 +203,7 @@ fn run_exec_time(
     true,
   );
 
-  let mut results = HashMap::<String, HashMap<String, i64>>::new();
+  let mut results = HashMap::<String, HashMap<String, f64>>::new();
   let hyperfine_results = read_json(benchmark_file)?;
   for ((name, _, _), data) in EXEC_TIME_BENCHMARKS.iter().zip(
     hyperfine_results
@@ -220,7 +220,7 @@ fn run_exec_time(
       data
         .into_iter()
         .filter(|(key, _)| RESULT_KEYS.contains(&key.as_str()))
-        .map(|(key, val)| (key, val.as_f64().unwrap() as i64))
+        .map(|(key, val)| (key, val.as_f64().unwrap()))
         .collect(),
     );
   }
@@ -382,11 +382,11 @@ struct BenchResult {
   // TODO(ry) The "benchmark" benchmark should actually be called "exec_time".
   // When this is changed, the historical data in gh-pages branch needs to be
   // changed too.
-  benchmark: HashMap<String, HashMap<String, i64>>,
+  benchmark: HashMap<String, HashMap<String, f64>>,
   binary_size: HashMap<String, i64>,
   bundle_size: HashMap<String, i64>,
   cargo_deps: usize,
-  max_latency: HashMap<String, i64>,
+  max_latency: HashMap<String, f64>,
   max_memory: HashMap<String, i64>,
   lsp_exec_time: HashMap<String, i64>,
   req_per_sec: HashMap<String, i64>,
@@ -489,7 +489,7 @@ async fn main() -> Result<()> {
     new_data.req_per_sec = req_per_sec;
     let max_latency = stats
       .iter()
-      .map(|(name, result)| (name.clone(), result.latency as i64))
+      .map(|(name, result)| (name.clone(), result.latency))
       .collect();
 
     reporter.write("max_latency", &max_latency);
diff --git a/cli/bench/metrics.rs b/cli/bench/metrics.rs
index c49ca90208..964fdde4b9 100644
--- a/cli/bench/metrics.rs
+++ b/cli/bench/metrics.rs
@@ -17,9 +17,9 @@ static GIT_HASH: Lazy<String> = Lazy::new(|| {
 });
 
 #[derive(serde::Serialize)]
-struct Metric {
+struct Metric<T: serde::Serialize> {
   name: String,
-  value: i64,
+  value: T,
   sha1: String,
   #[serde(rename = "type")]
   type_: String,
@@ -62,7 +62,12 @@ impl Reporter {
     }
   }
 
-  pub fn write_one(&mut self, type_: &str, name: &str, value: i64) {
+  pub fn write_one<T: serde::Serialize>(
+    &mut self,
+    type_: &str,
+    name: &str,
+    value: T,
+  ) {
     self
       .wtr
       .serialize(Metric {
@@ -75,7 +80,11 @@ impl Reporter {
       .unwrap();
   }
 
-  pub fn write(&mut self, type_: &str, hashmap: &HashMap<String, i64>) {
+  pub fn write<T: serde::Serialize + Copy>(
+    &mut self,
+    type_: &str,
+    hashmap: &HashMap<String, T>,
+  ) {
     for (name, value) in hashmap {
       self.write_one(type_, name, *value);
     }