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speedup import by bulk-updating DOM every 50 styles or 1 sec

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tophf 2017-04-12 18:31:52 +03:00
parent 1749057b91
commit 4f2ccbe6cb
1 changed files with 13 additions and 5 deletions
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18
backup/fileSaveLoad.js
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@ -67,7 +67,10 @@ function importFromString(jsonString) {
invalid: {names: [], legend: 'invalid skipped'},
};
let index = 0;
let lastRepaint = performance.now();
let lastRenderTime = performance.now();
const renderQueue = [];
const RENDER_NAP_TIME_MAX = 1000; // ms
const RENDER_QUEUE_MAX = 50; // number of styles
return new Promise(proceed);
function proceed(resolve) {
@ -100,10 +103,13 @@ function importFromString(jsonString) {
reason: 'import',
notify: false,
})).then(style => {
handleUpdate(style, {reason: 'import'});
if (performance.now() - lastRepaint > 1000) {
scrollElementIntoView($('#style-' + style.id));
lastRepaint = performance.now();
renderQueue.push(style);
if (performance.now() - lastRenderTime > RENDER_NAP_TIME_MAX
|| renderQueue.length > RENDER_QUEUE_MAX) {
renderQueue.forEach(style => handleUpdate(style, {reason: 'import'}));
setTimeout(scrollElementIntoView, 0, $('#style-' + renderQueue.pop().id));
renderQueue.length = 0;
lastRenderTime = performance.now();
}
setTimeout(proceed, 0, resolve);
if (!oldStyle) {
@ -126,6 +132,8 @@ function importFromString(jsonString) {
});
return;
}
renderQueue.forEach(style => handleUpdate(style, {reason: 'import'}));
renderQueue.length = 0;
done(resolve);
}