我们的 CI 构建的 GitVersion 步骤现在需要 4-5 分钟，我们无法真正弄清楚为什么。以下是一些基本日志：
2018-09-25T14:31:02.4222252Z ##[section]Starting: GitVersion
2018-09-25T14:31:02.4227925Z ==============================================================================
2018-09-25T14:31:02.4228168Z Task : GitVersion Task
2018-09-25T14:31:02.4228396Z Description : Easy Semantic Versioning (http://semver.org) for projects using Git
2018-09-25T14:31:02.4228654Z Version : 3.6.5
2018-09-25T14:31:02.4229010Z Author : GitVersion Contributors
2018-09-25T14:31:02.4229302Z Help : See the [documentation](http://gitversion.readthedocs.org/en/latest/) for help
2018-09-25T14:31:02.4229565Z ==============================================================================
2018-09-25T14:31:02.4366228Z Preparing task execution handler.
2018-09-25T14:31:02.6709097Z Executing the powershell script: d:\w\_tasks\GitVersion_e5983830-3f75-11e5-82ed-81492570a08e\3.6.5\GitVersion.ps1
2018-09-25T14:31:03.0124372Z Current Directory: D:\w\_tasks\GitVersion_e5983830-3f75-11e5-82ed-81492570a08e\3.6.5
2018-09-25T14:31:03.0124924Z
2018-09-25T14:31:03.0125184Z
2018-09-25T14:31:03.0130879Z Sources Directory: d:\w\1\s
2018-09-25T14:31:03.0131239Z
2018-09-25T14:31:03.0131454Z
2018-09-25T14:31:03.0230450Z Invoking GitVersion with d:\w\1\s /output buildserver /nofetch
2018-09-25T14:31:03.0231023Z
2018-09-25T14:31:03.0231265Z
2018-09-25T14:31:03.0285337Z D:\w\_tasks\GitVersion_e5983830-3f75-11e5-82ed-81492570a08e\3.6.5\GitVersion.exe d:\w\1\s /output buildserver /nofetch
2018-09-25T14:31:03.1207954Z INFO [09/25/18 14:31:03:10] Working directory: d:\w\1\s
2018-09-25T14:31:03.1208779Z INFO [09/25/18 14:31:03:10] IsDynamicGitRepository: False
2018-09-25T14:31:03.1344488Z INFO [09/25/18 14:31:03:12] Returning Project Root from DotGitDirectory: d:\w\1\s\.git - d:\w\1\s
2018-09-25T14:31:03.1380473Z INFO [09/25/18 14:31:03:12] Running on Windows.
2018-09-25T14:31:03.1438147Z INFO [09/25/18 14:31:03:13] Applicable build agent found: 'VsoAgent'.
2018-09-25T14:31:03.1442989Z INFO [09/25/18 14:31:03:13] Branch from build environment: refs/heads/develop
2018-09-25T14:32:49.2277821Z INFO [09/25/18 14:32:49:22] IsDynamicGitRepository: False
2018-09-25T14:32:49.2281217Z INFO [09/25/18 14:32:49:22] Returning Project Root from DotGitDirectory: d:\w\1\s\.git - d:\w\1\s
2018-09-25T14:32:49.2281501Z INFO [09/25/18 14:32:49:22] Project root is: d:\w\1\s
2018-09-25T14:32:49.2281789Z INFO [09/25/18 14:32:49:22] DotGit directory is: d:\w\1\s\.git
2018-09-25T14:32:49.4925166Z INFO [09/25/18 14:32:49:47] IsDynamicGitRepository: False
2018-09-25T14:32:49.4926214Z INFO [09/25/18 14:32:49:47] Returning Project Root from DotGitDirectory: d:\w\1\s\.git - d:\w\1\s
2018-09-25T14:32:49.5009080Z INFO [09/25/18 14:32:49:49] Begin: Loading version variables from disk cache
2018-09-25T14:32:49.5014606Z INFO [09/25/18 14:32:49:49] Cache file d:\w\1\s\.git\gitversion_cache\EDAA5BA150AAFFAFF7ABE57C2BFD74AA4AA3B217.yml not found.
2018-09-25T14:32:49.5021815Z INFO [09/25/18 14:32:49:49] End: Loading version variables from disk cache (Took: 0.00ms)
2018-09-25T14:32:49.5029581Z INFO [09/25/18 14:32:49:49] IsDynamicGitRepository: False
2018-09-25T14:32:49.5030888Z INFO [09/25/18 14:32:49:49] Returning Project Root from DotGitDirectory: d:\w\1\s\.git - d:\w\1\s
2018-09-25T14:32:49.5151471Z INFO [09/25/18 14:32:49:50] Using latest commit on specified branch
2018-09-25T14:32:50.2769177Z INFO [09/25/18 14:32:50:27] Running against branch: develop (c7dfbbf862e9681bea20563bd4591f004ee74f0d)
2018-09-25T14:32:50.2862740Z INFO [09/25/18 14:32:50:27] Begin: Calculating base versions
2018-09-25T14:32:50.5260304Z INFO [09/25/18 14:32:50:52] Fallback base version: 0.1.0 with commit count source ed0e73ed52b1f271e3914267b510b5dd230eedce
2018-09-25T14:33:02.7492807Z INFO [09/25/18 14:33:02:74] Git tag 'v0.5.0-unstable.3243': 0.5.0-unstable.3243 with commit count source 63ee9c744ab7eeec6ea313f9630087b7c4cde4f1
2018-09-25T14:33:02.7607508Z INFO [09/25/18 14:33:02:75] Git tag 'v0.5.0-unstable.3240': 0.5.0-unstable.3240 with commit count source d71d3d708b84252ad53f256000279142e9288687
2018-09-25T14:33:02.7698133Z INFO [09/25/18 14:33:02:75] Git tag 'v0.5.0-ie11-clipboard.9+3256': 0.5.0-ie11-clipboard.9+3256 with commit count source 438fd61e9a4ee18abd55f956764a92595097be45
... for about 3000 lines ...
2018-09-25T14:33:54.1517668Z INFO [09/25/18 14:33:54:14] Git tag 'v0.1.0-unstable.1736': 0.1.0-unstable.1736 with commit count source 1469b1d1b38e7113ff765b3d591d42529f03f03a
2018-09-25T14:33:54.1734453Z INFO [09/25/18 14:33:54:16] Git tag 'v0.1.0-unstable.1735': 0.1.0-unstable.1735 with commit count source 5375858e279e253fc4578af8b0be29d5b4269e3e
2018-09-25T14:33:54.2005144Z INFO [09/25/18 14:33:54:19] Git tag 'v0.1.0-unstable.1734': 0.1.0-unstable.1734 with commit count source 63b6ad54121d9e4d06ddac4e80eda3f9f5709763
2018-09-25T14:34:09.7603293Z INFO [09/25/18 14:34:09:75] Merge target tagged 'v0.5.0-unstable.3243': 0.5.0-unstable.3243 with commit count source 63ee9c744ab7eeec6ea313f9630087b7c4cde4f1
2018-09-25T14:34:09.7706672Z INFO [09/25/18 14:34:09:75] Merge target tagged 'v0.5.0-unstable.3240': 0.5.0-unstable.3240 with commit count source d71d3d708b84252ad53f256000279142e9288687
2018-09-25T14:34:09.7805193Z INFO [09/25/18 14:34:09:77] Merge target tagged 'v0.5.0-ie11-clipboard.9+3256': 0.5.0-ie11-clipboard.9+3256 with commit count source 438fd61e9a4ee18abd55f956764a92595097be45
... for about 4000 lines like these ...
2018-09-25T14:35:13.8552137Z INFO [09/25/18 14:35:13:85] Merge target tagged 'v0.1.0-unstable.1736': 0.1.0-unstable.1736 with commit count source 1469b1d1b38e7113ff765b3d591d42529f03f03a
2018-09-25T14:35:13.8851950Z INFO [09/25/18 14:35:13:88] Merge target tagged 'v0.1.0-unstable.1735': 0.1.0-unstable.1735 with commit count source 5375858e279e253fc4578af8b0be29d5b4269e3e
2018-09-25T14:35:13.9069833Z INFO [09/25/18 14:35:13:89] Merge target tagged 'v0.1.0-unstable.1734': 0.1.0-unstable.1734 with commit count source 63b6ad54121d9e4d06ddac4e80eda3f9f5709763
2018-09-25T14:35:14.1701044Z INFO [09/25/18 14:35:14:16] Merge message 'Merge remote-tracking branch 'origin/release/v0.4.4' into develop': 0.4.4 with commit count source 081fe710a28ef0698520cc71c04ab4dd84028cbb
2018-09-25T14:35:14.1845666Z INFO [09/25/18 14:35:14:18] Merge message 'Merge branch 'release/v0.4.4' into develop': 0.4.4 with commit count source 46869edcecde68f5dc6d48721f0f4bb33b966932
2018-09-25T14:35:14.2046186Z INFO [09/25/18 14:35:14:19] Merge message 'Merge branch 'release/v0.4.4' of https://Company.visualstudio.com/Project/_git/GitRepo into release/v0.4.4': 0.4.4 with commit count source 407eea8e4dc3e779bc29359c39366e92f74db3dc
2018-09-25T14:35:14.2204322Z INFO [09/25/18 14:35:14:21] Merge message 'Merge branch 'hotfix/0.4.3'': 0.4.3 with commit count source 7e520eefc12c7aae61576fefba9aecb733259fdd
2018-09-25T14:35:14.2360008Z INFO [09/25/18 14:35:14:22] Merge message 'Merge branch 'hotfix/0.4.3' into develop': 0.4.3 with commit count source aa1bf7038192e1e43c5922997e9c7deee32365bb
2018-09-25T14:35:14.2505000Z INFO [09/25/18 14:35:14:24] Merge message 'Merge remote-tracking branch 'origin/release/v0.4.1' into develop': 0.4.1 with commit count source a00395b8c59b7bc0f1b4f6b2e15a69d779f00be5
2018-09-25T14:35:14.2754392Z INFO [09/25/18 14:35:14:27] Found multiple base versions which will produce the same SemVer (0.5.0), taking oldest source for commit counting (Merge message 'Merge branch 'hotfix/0.4.3' into develop')
2018-09-25T14:35:14.2754999Z INFO [09/25/18 14:35:14:27] Base version used: Merge message 'Merge remote-tracking branch 'origin/release/v0.4.1' into develop': 0.4.1 with commit count source aa1bf7038192e1e43c5922997e9c7deee32365bb
2018-09-25T14:35:14.2755712Z INFO [09/25/18 14:35:14:27] End: Calculating base versions (Took: 144,000.01ms)
2018-09-25T14:35:15.0181063Z INFO [09/25/18 14:35:15:00] 3280 commits found between aa1bf7038192e1e43c5922997e9c7deee32365bb and c7dfbbf862e9681bea20563bd4591f004ee74f0d
2018-09-25T14:35:15.0446700Z INFO [09/25/18 14:35:15:03] Begin: Creating dictionary
2018-09-25T14:35:15.0478209Z INFO [09/25/18 14:35:15:03] End: Creating dictionary (Took: 0.00ms)
2018-09-25T14:35:15.0503865Z INFO [09/25/18 14:35:15:03] Begin: Storing version variables to cache file d:\w\1\s\.git\gitversion_cache\EDAA5BA150AAFFAFF7ABE57C2BFD74AA4AA3B217.yml
2018-09-25T14:35:15.1043234Z INFO [09/25/18 14:35:15:10] End: Storing version variables to cache file d:\w\1\s\.git\gitversion_cache\EDAA5BA150AAFFAFF7ABE57C2BFD74AA4AA3B217.yml (Took: 62.50ms)
2018-09-25T14:35:15.1109747Z INFO [09/25/18 14:35:15:10] Applicable build agent found: 'VsoAgent'.
2018-09-25T14:35:15.1119265Z Executing GenerateSetVersionMessage for 'VsoAgent'.
2018-09-25T14:35:15.2560540Z Executing GenerateBuildLogOutput for 'VsoAgent'.
2018-09-25T14:35:15.2633144Z ##[section]Async Command Start: Update Build Number
2018-09-25T14:35:15.4482707Z Update build number to 0.5.0-unstable.3280 for build 6560
2018-09-25T14:35:15.4483044Z ##[section]Async Command End: Update Build Number
2018-09-25T14:35:15.4484260Z ##[section]Finishing: GitVersion
这是一个 VSTS 版本。我们正在使用我们认为的 GitFlow。功能分支有时会被删除，有时不会。也许这里有一些清理工作要做。
关于为什么要花这么长时间执行的任何想法？