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Auto merge of #110655 - ChrisDenton:read-to-end, r=joshtriplett

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Limit read size in `File::read_to_end` loop

Fixes #110650.

Windows file reads have perf overhead that's proportional to the buffer size. When we have a reasonable expectation that we know the file size, we can set a reasonable upper bound for the size of the buffer in one read call.
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bors 2023-04-23 06:58:28 +00:00
commit 9de7d9169c
4 changed files with 43 additions and 24 deletions
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library/std/src/lib.rs
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@ -288,6 +288,7 @@
#![feature(float_next_up_down)]
#![feature(hasher_prefixfree_extras)]
#![feature(hashmap_internals)]
#![feature(int_roundings)]
#![feature(ip)]
#![feature(ip_in_core)]
#![feature(maybe_uninit_slice)]