performance: add limits for MessageBody text generally and for quotes…

…, core already has limits on text size, but for the cases where core has a bug it's still useful to have a failsave

CHANGELOG.md

@@ -14,6 +14,7 @@
 - skip `requestSingleInstanceLock` on mac appstore builds (mas), because it made it unable to start the app on older macOS devices. #3946
 - fix tray icon explaination in settings that appears when started with `--minimized` #3949
 - performance: memorize MessageBody, don't run message parser multiple times for the same message #3951
+- performance: add limits for MessageBody text generally and for quotes, core already has limits on text size, but for the cases where core has a bug it's still useful to have a failsave #3951
 
 ### Removed
 - removed unused Roboto font variants #3949

src/renderer/components/message/Message.tsx

@@ -761,7 +761,12 @@ export const Quote = ({
             </>
           )}
           <div className='quoted-text'>
-            <MessageBody text={quote.text || ''} disableJumbomoji />
+            <MessageBody
+              text={
+                quote.text.slice(0, 3000 /* limit quoted message size */) || ''
+              }
+              disableJumbomoji
+            />
           </div>
         </div>
         {hasMessage && quote.image && (

src/renderer/components/message/MessageBody.tsx

@@ -3,13 +3,19 @@ import classNames from 'classnames'
 import { getSizeClass, replaceColons } from '../conversations/emoji'
 import { message2React } from './MessageMarkdown'
 
+/** limit where message parser will not parse the message, limit of core is lower, this is just a failsafe */
+const UPPER_LIMIT_FOR_PARSED_MESSAGES = 20_000
+
 function MessageBody({
   text,
   disableJumbomoji,
 }: {
   text: string
   disableJumbomoji?: boolean
 }): JSX.Element {
+  if (text.length >= UPPER_LIMIT_FOR_PARSED_MESSAGES) {
+    return <>{text}</>
+  }
   // if text is only emojis and Jumbomoji is enabled
   const emojifiedText = trim(text.replace(/:[\w\d_\-+]*:/g, replaceColons))
   if (!disableJumbomoji) {