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[Perf] Use SmallVec for additional temporary allocations #4
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ljedrz
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ljedrz
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May 30, 2024
/// Writes `self` into the given vector as a boolean array in little-endian order. | ||
fn write_bits_le(&self, vec: &mut Vec<bool>); | ||
fn write_bits_le<T: VecLike>(&self, vec: &mut T); | ||
|
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/// Writes `self` into the given vector as a boolean array in big-endian order. | ||
fn write_bits_be(&self, vec: &mut Vec<bool>); |
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note: this wasn't extended to write_bits_be
, as those haven't been showing up in heap profiles, and the implementation of indexing that it would have to involve is a little bit tricky
Signed-off-by: ljedrz <ljedrz@gmail.com>
Signed-off-by: ljedrz <ljedrz@users.noreply.github.com>
Signed-off-by: ljedrz <ljedrz@users.noreply.github.com>
Signed-off-by: ljedrz <ljedrz@users.noreply.github.com>
Signed-off-by: ljedrz <ljedrz@users.noreply.github.com>
Signed-off-by: ljedrz <ljedrz@users.noreply.github.com>
Signed-off-by: ljedrz <ljedrz@users.noreply.github.com>
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This is a follow-up to #3 which includes the same approach, but in scenarios that require some additional setup.
The first commit introduces a new trait,
VecLike
, which applies to bothVec<bool>
andSmallVec<[bool; N]>
, and allows us to use the latter inToBits
operations that are currently restricted to the former.While the new trait is quite trivial, it does require a bit of boilerplate (the
Extend::extend
,VecLike::extend_from_slice
etc.) for disambiguation. The upside is that together with the other linked PR, there are clear performance benefits to doing so:(measured in a
--dev
node in 15-minute local runs from scratch)