From fda2373d81929dda9d0206d30cf4e3c1710859f1 Mon Sep 17 00:00:00 2001
From: brian cully <bjc@spork.org>
Date: Mon, 29 Dec 2025 12:36:31 -0500
Subject: pure benching

---
 site/pure.mjs | 18 ++++++++++++++++++
 src/lib.rs    |  1 +
 2 files changed, 19 insertions(+)

diff --git a/site/pure.mjs b/site/pure.mjs
index e43380c..03b5996 100644
--- a/site/pure.mjs
+++ b/site/pure.mjs
@@ -259,6 +259,24 @@ export default async function () {
         }
     };
 
+    const benchButton = document.querySelector('section.bench button');
+    benchButton.onclick = e => {
+        console.debug('bench clicked');
+
+        const iters = Number(document.querySelector('section.bench input').value);
+
+        const start = self.performance.now();
+        for (let i = 0; i < iters; i++) {
+            update(points);
+        }
+        const end = self.performance.now();
+        const delta = end - start;
+        const iters_per_ms = iters / delta;
+
+        const results = document.querySelector('section.bench .results');
+        results.textContent = `${iters} iters in ${delta.toFixed(2)} ms (${iters_per_ms.toFixed(2)} iters per ms)`;
+    }
+
     let interCount = 1;
     function render(t) {
         update(points);
diff --git a/src/lib.rs b/src/lib.rs
index 3644638..dfbeaae 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -108,6 +108,7 @@ pub fn init() -> JSResult<()> {
 
     let bench_handler: HandlerClosure = Closure::new(move |e| {
         debug!("bench clicked {:?}", e);
+
         let iters = iters()?
             .value()
             .parse::<u32>()
-- 
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