[ISSUE]: gitversion 6.10.0 (and 6.5.0 as well) hangs for a while when calculating version

[simonachmueller]

Prerequisites

• I have written a descriptive issue title
• I have searched issues to ensure it has not already been reported

GitVersion package

GitVersion.Tool, gittools/actions, AzureDevops task

GitVersion version

6.10.0

Operating system

Linux, Windows

What are you seeing?

We are using git flow and mark specific commits on the release branch with a tag (looks like vX.X.X, v1.2.3 for example) and then run a Azure Devops build pipeline selecting that tag. Here is the GitVersion.yml

assembly-informational-format: "{FullSemVer}"
branches:
  develop:
    label: develop
  release:
    label: release
    is-release-branch: true
  hotfix:
    label: hotfix
ignore:
  sha: []
merge-message-formats: {}

Relevant release pipeline:

  - checkout: self
    clean: true
    fetchDepth: 0
  - task: gitversion/setup@3
    displayName: gitversion/setup
    inputs:
      versionSpec: 6.0.x
  - task: gitversion/execute@3
    displayName: gitversion/execute

We just updated from gitversion 5.12.0 to 6.0.5 and the gitversion/execute task takes now 1.5 hours for a first run and 3.5 hours a week later.
v5.12.0 finishes within a minute.
I can reproduce that behavior locally, by checking out our repository on a specific tag.

Gitversion starts as /opt/hostedtoolcache/GitVersion.Tool/6.0.5/dotnet-gitversion --roll-forward Major /home/vsts/work/1/s /output json /l console on the azure hosted build agent.
I can't provide the full output, but some findings:

Azure build agent reports memory and CPU warnings Agent environment resources - Disk: / Available 18306.55 MB out of 74244.74 MB, Memory: Used 6846.00 MB out of 6921.00 MB, CPU: Usage 94.92%

Gitversion runs fast in the beginning on tags with the output like Begin: Finding merge base between 'tags/v2.17.0' and 'origin/release/2.9.0'. etc
Then it stops for like 50 minutes and start to work on branches Begin: Finding merge base between 'hotfix/2.15.1' and 'master'.

Our repo has around a 100 active tags and somewhat about 15 active branches.

What is expected?

Gitversion finishes within few minutes

Steps to Reproduce

Run on a repo when a tag is checked out?

RepositoryFixture Test

No response

Output log or link to your CI build (if appropriate).

[HHobeck]

Is it possible to create a repository somehow to get it reproduceable? Or a integration test. What makes your repository so special beside the fact that you have a lot of tags.

[simonachmueller]

Can I somehow collect anonymous logs from gitversion to be able to provide it here? I don't think I would be able to re-create similar public repository to provide if for you.

[simonachmueller]

@HHobeck do you have ideas how I can provide additional information without exposing my repository?