Support showing more branches when a repository has many branches

[ymulenll]

I am trying to create a Pull Request, but I cannot find the branch to merge into it (I am looking for the branch develop).

It started to happen a couple of versions ago, the issue is probably happening because we have thousands of branches (most of them associated with merged PRs), and the extension is just displaying a bunch of them (like 900) but not all we have.

Some versions ago, the extension was selecting the default branch to merge into (develop), but now it not even displaying it.

• Extension version: 0.28.0
• VSCode Version: 1.59.0-insider
• OS: Windows 10

Steps to Reproduce:

1. GitHub Pull Requests: Create Pull Request

[joshuaobrien]

I am experiencing this issue also. I've started working on a fix.

[alexr00]

For users who have many branches, the extension would just freeze. We now have a timeout so that we don't freeze, but it does mean that not all branches will show.

[Giljjj]

Currently listBranches timeout limit is hard-coded:

vscode-pull-request-github/src/github/githubRepository.ts

Line 1160 in 1066de6

if (new Date().getTime() - startingTime > 5000) {

We are hitting this limit and cannot find relevant branches.
We do not mind waiting longer if it means we can find the branches we are working with.

Maybe this value can be configurable in the settings? This will allow everyone to customize the balance between showing complete results and the extension responsiveness.

[alexr00]

If anyone wants to contribute such a setting I would accept a PR for it! In addition to a setting, we would ideally save recently used branches and show those immediately.