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sort: read files as chunks, off-thread

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Instead of using a BufReader and reading each line separately,
allocating a String for each one, we read to a chunk. Lines are
references to this chunk. This makes the allocator's job much easier
and yields performance improvements.

Chunks are read on a separate thread to further improve performance.
This commit is contained in:
Michael Debertol 2021-05-16 21:13:37 +02:00
parent 9e2c82d8e7
commit fcd48813e0
11 changed files with 1003 additions and 452 deletions
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4
tests/by-util/test_sort.rs
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@ -122,7 +122,7 @@ fn test_check_zero_terminated_failure() {
.arg("-c")
.arg("zero-terminated.txt")
.fails()
.stdout_is("sort: disorder in line 0\n");
.stdout_is("sort: zero-terminated.txt:2: disorder: ../../fixtures/du\n");
}
#[test]
@ -621,7 +621,7 @@ fn test_check() {
.arg("-c")
.arg("check_fail.txt")
.fails()
.stdout_is("sort: disorder in line 4\n");
.stdout_is("sort: check_fail.txt:6: disorder: 5\n");
new_ucmd!()
.arg("-c")