Ports view first opening is very slow than previous Remote Explorer

[mustard-mh]

New experimental Ports view improvement. More details see #11154.

Proposal

• IDE proxy with cache

[mustard-mh]

As we can see in Dev Network, most Waterfalls are spent on VSCode inner process, which we can't speed up or cache it

This is due to we are using VSCode's WebviewViewProvider. If we can use Webview to replace it, then we can cache it.

But according to VSCode doc https://code.visualstudio.com/api/references/contribution-points#contributes.views. We need WebviewViewProvider or TreeView once we want to locate it at Panel

(TreeView it's a built-in component don't need those Waterfalls)

cc @akosyakov @jeanp413

[akosyakov]

From your screenshot, it looks like caching will save more than 1s is not it? On my connection it will bring down from 547
ms to 310 ms.

@iQQBot Can we add observability for latency in ws-proxy for blobserve routes? I want to know how much it takes to forward. Maybe we can save some time by caching? It is not much data and should not change often. cc @csweichel