git 2.44 writes to console inefficiently

[Danstiv]

Existing issues matching what you're seeing

• I was not able to find an open or closed issue matching what I'm seeing

Git for Windows version

git version 2.44.0.rc0.windows.1
cpu: x86_64
built from commit: 5cff971ba4c5c91f881d277bfeb6a88fa8c17745
sizeof-long: 4
sizeof-size_t: 8
shell-path: /bin/sh
feature: fsmonitor--daemon

Windows version

Windows 11

Windows CPU architecture

x86_64 (64-bit)

Additional Windows version information

Microsoft Windows [Version 10.0.26100.4652]

Options set during installation

Extracted portable git

Other interesting things

No response

Terminal/shell

cmd in windows terminal

Commands that trigger the issue

git

Expected behaviour

git should output any information using big chunks, like in 2.43

Actual behaviour

Git starting from 2.44 outputs text character by character intermittently , Which is potentially not efficient , and worsens the experience of blind users who use Windows Terminal.
Here is the logs collected using wpr.
For 2.43

---
timestamp: 2025-07-21 11:44:00.975
level: 5
provider: Microsoft.Windows.Console.Host
event: API_WriteConsoleW
payload:
  OriginatingProcess: 30832
  OriginatingThread: 33488
  NumBytes: 0
  Buffer: "usage: git [-v | --version] ...rest of the help message...\n"
---
timestamp: 2025-07-21 11:44:00.975
level: 5
provider: Microsoft.Windows.Terminal.Connection
event: ReadFile
payload:
  buffer: "usage: git [-v | --version] ...rest of the help message...\r\n"
  session: 43d399c8-4600-435c-8512-41f78416f71d

And for 2.44:

timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Console.Host
event: API_WriteConsoleA
payload:
  OriginatingProcess: 34704
  OriginatingThread: 35188
  NumBytes: 0
  Buffer: "u"
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Terminal.Connection
event: ReadFile
payload:
  buffer: "u"
  session: 20cd668f-83d9-4bee-8a04-8a39f364944f
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Console.Host
event: API_WriteConsoleA
payload:
  OriginatingProcess: 34704
  OriginatingThread: 35188
  NumBytes: 0
  Buffer: "sage: git [-v | --version] [-h | --help] [-C <path>] [-c <name>=<value>]\n           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n           [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--bare]\n           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n           [--config-env=<name>=<envvar>] <command> [<args>]\n\n"
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Terminal.Connection
event: ReadFile
payload:
  buffer: "sage: git [-v | --version] [-h | --help] [-C <path>] [-c <name>=<value>]\r\n           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\r\n           [-p | --paginate | -P | --no-pager] [--no-replace-objects] [--bare]\r\n           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\r\n           [--config-env=<name>=<envvar>] <command> [<args>]\r\n\n"
  session: 20cd668f-83d9-4bee-8a04-8a39f364944f
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Console.Host
event: API_WriteConsoleA
payload:
  OriginatingProcess: 34704
  OriginatingThread: 35188
  NumBytes: 0
  Buffer: "These are common Git commands used in various situations:\n"
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Console.Host
event: API_WriteConsoleA
payload:
  OriginatingProcess: 34704
  OriginatingThread: 35188
  NumBytes: 0
  Buffer: "\n"
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Terminal.Connection
event: ReadFile
payload:
  buffer: "These are common Git commands used in various situations:\r\n"
  session: 20cd668f-83d9-4bee-8a04-8a39f364944f
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Terminal.Connection
event: ReadFile
payload:
  buffer: "\r\n"
  session: 20cd668f-83d9-4bee-8a04-8a39f364944f
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Console.Host
event: API_WriteConsoleA
payload:
  OriginatingProcess: 34704
  OriginatingThread: 35188
  NumBytes: 0
  Buffer: "start a working area (see also: git help tutorial)\n"
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Terminal.Connection
event: ReadFile
payload:
  buffer: "start a working area (see also: git help tutorial)\r\n"
  session: 20cd668f-83d9-4bee-8a04-8a39f364944f
---
timestamp: 2025-07-21 11:44:04.577
level: 5
provider: Microsoft.Windows.Console.Host
event: API_WriteConsoleA
payload:
  OriginatingProcess: 34704
  OriginatingThread: 35188
  NumBytes: 0
  Buffer: " "
...

See #18485 in windows terminal repo for details.

Repository

No response

[dscho]

git version 2.44.0.rc0.windows.1

You will definitely want to upgrade. In addition to severe security issues, that might also fix the issue you encountered.

In any case, why are you running an "rc0"? I can understand if people run v2.51.0-rc0 right now (even if rc1 is already available), to help with testing — which is much appreciated! — but I cannot understand running with an rc version if the corresponding final version is already available...

[rimrul]

In any case, why are you running an "rc0"?

I think they arent actually using that version daily, but wanted to express that 2.44.0-rc0 introduced this behaviour, while 2.43.0 was the last version that behaved as expected.

[Danstiv]

why are you running an "rc0"?

Sorry for the confusion, this version is the first version after 2.43, in which the problem is observed.
This problem is also available in 2.51.

wanted to express that 2.44.0-rc0 introduced this behaviour

Exactly.

[Danstiv]

Just checked 2.51.0.rc1, behavior remains the same.

[dscho]

Just checked 2.51.0.rc1, behavior remains the same.

Okay, thank you for the clarification. Next stop: Test with vanilla Cygwin (a fork of which is responsible of this behavior in Git for Windows).

[Danstiv]

Could not reproduce with git from cygwin.
Installed cygwin, selected git package in installer.

git version 2.45.1
cpu: x86_64
no commit associated with this build
sizeof-long: 8
sizeof-size_t: 8
shell-path: /bin/sh

[dscho]

Could not reproduce with git from cygwin.

Can you reproduce with Git for Windows, as launched from Cygwin? The reason I ask: Cygwin's git uses a very different way to write the the Console (namely, the Cygwin-based one), while Git for Windows uses the regular Win32 way to write. If you can reproduce with Git for Windows, can you then also reproduce with any other native Win32 program (e.g. python or node)?