Add lazy loading support to product menu to reduce server load

• Type: Story
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 7.0.0 CE GA1
• Component/s: Performance, Product Menu
• Labels:
  • NAT
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/34441

Processing and rendering product menu every time on every page generates heavy load to server under high concurrency, as shown by the test result:

Portal Version / Portlet removed	Session Count
Base Line	7384
Product menu portlet	11900

With lazy loading, we could get similar performance improvement:

Test on	Session Count
Base Line	7079
Lazy Loading Product Menu	11611

To reduce server load and maintain user experience:

• load the product menu portlet together with the page, if the panel is open,
• do not load the portlet until user opens the panel, if the panel is closed.