Ping: [3.6.10 regression] Pasting in shell is SIGNIFICANTLY SLOW

[Zhongteng Gui]

Gentle ping.

On 2026/08/13 17:02, Zhongteng Gui wrote:
> This bug was first discovered in MSYS2, at:
> 1. https://github.com/msys2/msys2-runtime/issues/358
> 2. https://github.com/msys2/MSYS2-packages/issues/6501
> 
> However, it also reproduces on Cygwin bash, so I posted it here.
> 
> How to reproduce (copied from above issue):
> Copy any multiline text and paste it to terminal. (singleline text pasting is
> also slow, but not that significant)
> For 3.6.9, the time cost is nearly ignorable, especially for bash.
> For 3.6.10, both bash and zsh takes significant time (more than 20s for less
> than 200 characters, 6 lines).
> 
> Note: the regression is slightly smaller in Cygwin than in MSYS2. The paste
> speed in bash is about 1000 chars/s on MSYS2 3.6.9, 100 chars/s on Cygwin
> 3.6.10, and 10 chars/s on MSYS2 3.6.10. Cygwin 3.6.9 is not tested because I'm
> unfamiliar with Cygwin, and failed to downgrade.