Memory leak when enter text using the fromTextArea #6409

RyuDoizaki · 2020-09-11T02:50:16Z

Entering text using fromTextArea seems to cause a memory leak.

I checked this in Chrome.

Video showing the memory leak.

Source Code.

<html>
    <head>
        <link rel="stylesheet" href="./codemirror-5.57.0/lib/codemirror.css">
        <script src="./codemirror-5.57.0/lib/codemirror.js"></script>
    </head>
    <body>
        <textarea id="targetTextarea" cols="30" rows="10"></textarea>
        <br><br><div id="add">codemirror add</div>
        <br><div id="remove">codemirror remove</div>
        <script>
            let codemirror = undefined;
            let targetTextareaEl = undefined;
            let addEl = undefined;
            let removeEl = undefined;
            window.onload = function(){
                targetTextareaEl = document.querySelector('#targetTextarea');
                addEl = document.querySelector('#add');
                removeEl = document.querySelector('#remove');

                addEl.addEventListener('click', () => {
                    if(!codemirror) {
                        codemirror = CodeMirror.fromTextArea(targetTextareaEl);
                    }
                });
                removeEl.addEventListener('click', () => {
                    if(codemirror){
                        codemirror.toTextArea();
                    }
                    codemirror = undefined;
                });
            }
        </script>
    </body>
</html>

Adding characters by paste or deleting characters by delete key did not leak the memory

marijnh · 2020-09-11T05:42:18Z

I can't reproduce this (pressing the garbage can icon takes the memory down the original level for me). If you can write a script that automatically, in a loop, causes significant amounts of extra memory to be consumed in a way that doesn't allow collecting, I'd be interested to take a look. But as it is, this doesn't give me enough to work with.

marijnh closed this as completed Sep 11, 2020

This was referenced Sep 11, 2020

Memory leak when using fromTextArea #6410

Closed

Memory leak when executing toTextarea after entering characters #6411

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Memory leak when enter text using the fromTextArea #6409

Memory leak when enter text using the fromTextArea #6409

RyuDoizaki commented Sep 11, 2020

marijnh commented Sep 11, 2020

Memory leak when enter text using the fromTextArea #6409

Memory leak when enter text using the fromTextArea #6409

Comments

RyuDoizaki commented Sep 11, 2020

marijnh commented Sep 11, 2020