fix: perf

Author: samdenty

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ios-vibrator-pro-max",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "description": "Bringing the vibes back to iOS safari...",
   "homepage": "https://ios-vibrate-api-demo.vercel.app/",
   "type": "module",

src/mergeVibrations.ts

@@ -37,10 +37,7 @@ export function mergeVibrations(...patterns: Vibration[]): number[] {
           currentTime - startTime + interval
         );
 
-        // Mark the vibration period in the timeline
-        for (let i = fromIndex; i < toIndex; i++) {
-          timeline[i] = true;
-        }
+        timeline.fill(true, fromIndex, toIndex);
       }
       currentTime += interval;
       isVibrating = !isVibrating;
@@ -49,12 +46,13 @@ export function mergeVibrations(...patterns: Vibration[]): number[] {
 
   // Convert timeline back to intervals
   const result: number[] = [];
+  const length = timeline.length;
   let currentState = timeline[0];
   let currentCount = 0;
 
   // Process the timeline including the final state transition
-  for (let i = 0; i <= timeline.length; i++) {
-    const newState = i < timeline.length ? timeline[i] : !currentState;
+  for (let i = 0; i <= length; i++) {
+    const newState = i < length ? timeline[i] : !currentState;
 
     if (newState !== currentState) {
       if (currentCount > 0) {
@@ -77,3 +75,36 @@ export function mergeVibrations(...patterns: Vibration[]): number[] {
 
   return result;
 }
+
+export function trimVibrations(amount: number, patterns: number[]): number[] {
+  // Initialize result array
+  const result: number[] = [];
+
+  // Apply remaining amount to the first element
+  let remainingAmount = amount;
+
+  // Process each vibration in the pattern
+  for (let i = 0; i < patterns.length; i++) {
+    const currentVibration = patterns[i];
+
+    // If we still have amount to trim
+    if (remainingAmount > 0) {
+      // Calculate what's left after trimming
+      const remaining = currentVibration - remainingAmount;
+
+      // If there's duration left, add it to the result
+      if (remaining > 0) {
+        result.push(remaining);
+        remainingAmount = 0; // Used all the trim amount
+      } else {
+        // This vibration was completely consumed
+        remainingAmount = Math.abs(remaining); // Carry over the remaining amount
+      }
+    } else {
+      // No more trimming needed, add the vibration as is
+      result.push(currentVibration);
+    }
+  }
+
+  return result;
+}

src/pro-max-vibrator.ts

@@ -1,6 +1,6 @@
 // Sorry Tim Cook, PWAs deserve some love too...
 
-import { mergeVibrations, type Vibration } from "./mergeVibrations.js";
+import { trimVibrations, type Vibration } from "./mergeVibrations.js";
 
 const SAFARI_VERSION = getSafariVersion();
 const MAGIC_NUMBER = 26.26;
@@ -49,7 +49,10 @@ async function grantedVibrate() {
   let adjustment = 0;
 
   while (true) {
-    vibration = [Date.now(), mergeVibrations([Date.now(), []], vibration)];
+    vibration = [
+      Date.now(),
+      trimVibrations(Date.now() - vibration[0], vibration[1]),
+    ];
 
     const [vibrateMs, waitMs] = vibration[1] as (number | undefined)[];