Perf: Transcript and Activity render speed

CHANGELOG.md

@@ -29,6 +29,8 @@ Notes: web developers are advised to use [`~` (tilde range)](https://github.com/
 -  Improved performance for `useActivityWithRenderer`, in PR [#5172](https://github.com/microsoft/BotFramework-WebChat/pull/5172), by [@OEvgeny](https://github.com/OEvgeny)
 -  Fixes [#5162](https://github.com/microsoft/BotFramework-WebChat/issues/5162). Improved performance for `useActivityTreeWithRenderer`, in PR [#5163](https://github.com/microsoft/BotFramework-WebChat/pull/5163), by [@compulim](https://github.com/compulim)
 -  Fixes [#5175](https://github.com/microsoft/BotFramework-WebChat/issues/5175). `PrecompiledGlobalize.js` is emitted instead of `.cjs`, by [@compulim](https://github.com/compulim) in PR [#5181](https://github.com/microsoft/BotFramework-WebChat/pull/5181)
+-  Improved performance for `BasicTranscript`, in PR [5183](https://github.com/microsoft/BotFramework-WebChat/pull/5183), by [@OEvgeny](https://github.com/OEvgeny)
+-  Fixed potential memory usage issues caused by `useActivitiesWithRenderer`, in PR [5183](https://github.com/microsoft/BotFramework-WebChat/pull/5183), by [@OEvgeny](https://github.com/OEvgeny)
 
 ### Changed
 

__tests__/html/fluentTheme/attachMultipleFiles.html

@@ -63,9 +63,10 @@
           { type: 'image/jpeg' }
         );
 
-        await pageObjects.runHook(({ useSendBoxAttachments }) =>
-          useSendBoxAttachments()[1]([{ blob: blob1 }, { blob: blob2 }])
-        );
+        await pageObjects.runHook(({ useSendBoxAttachments }) => {
+          const attachmentsRef = React.useRef([{ blob: blob1 }, { blob: blob2 }]);
+          useSendBoxAttachments()[1](attachmentsRef.current);
+        });
 
         await pageConditions.became(
           'attachment count change to 2',

__tests__/html/renderActivity.performance.js

@@ -1,5 +1,5 @@
 /** @jest-environment ./packages/test/harness/src/host/jest/WebDriverEnvironment.js */
 
-describe('Batched renderer', () => {
+describe('Activity render performance', () => {
   test('does not produce unnecessary rerenders', () => runHTML('renderActivity.performance'));
 });