[PATCH] D54995: [MemoryBuffer] By default assume that all files are volatile to prevent unintended file locks

[Ilya Biryukov via cfe-commits]

On Thu, Nov 29, 2018 at 4:06 PM Zachary Turner <zturner at google.com> wrote:

> If this is to go in (which I think is still not clear), it definitely
> should be limited to clangd. Not using mapped files is an order of
> magnitude performance regression for many use cases.
>
Absolutely, we have to make sure this does not touch the actual compiler
(and probably even clangd on non-windows platforms).
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