zumerlab
diff --git a/‎src/core/clone.js‎
Lines changed: 6 additions & 2 deletions b/‎src/core/clone.js‎
Lines changed: 6 additions & 2 deletions
diff --git a/‎src/utils/clone.helpers.js‎
Lines changed: 6 additions & 0 deletions b/‎src/utils/clone.helpers.js‎
Lines changed: 6 additions & 0 deletions
@@ -21,7 +21,7 @@ import {
  getUnscaledDimensions,
  createCheckboxRadioReplacement
 } from '../utils/clone.helpers.js'
-import { isFirefox } from '../utils/browser.js'
+import { isFirefox, isSafari } from '../utils/browser.js'
 
 // helper implementations moved to ../utils/clone.helpers.js
 
@@ -164,7 +164,11 @@ export async function deepClone(node, sessionCache, options) {
  try {
  const ctx = node.getContext('2d', { willReadFrequently: true })
  try { ctx && ctx.getImageData(0, 0, 1, 1) } catch { }
- await new Promise(r => requestAnimationFrame(r)) // deja materializar el frame
+ // WebKit needs a frame for the poke to materialize the buffer; on other engines
+ // toDataURL is synchronous with issued commands, so an unconditional rAF cost a
+ // serialized frame (≥16ms) per canvas — dashboards with N charts paid N frames.
+ // The blank-result retry below still covers any engine that returns an empty frame.
+ if (isSafari()) await new Promise(r => requestAnimationFrame(r))
 
  url = node.toDataURL('image/png')
 
 
@@ -17,6 +17,12 @@ import { inlineAllStyles } from '../modules/styles.js'
  * @returns {Promise<(Node|null)[]>}
  */
 export function idleCallback(childList, callback, fast) {
+ if (fast) {
+ // Fast mode ran every child through deal()/idle() anyway (synchronously), paying an extra
+ // promise + two closures per node — tens of thousands of allocations on large trees.
+ // Call straight through; Promise.all keeps the same concurrency and ordering.
+ return Promise.all(childList.map((child) => new Promise((resolve) => callback(child, resolve))))
+ }
  return Promise.all(childList.map((child) => {
  return new Promise((resolve) => {
  function deal() {