Simplify HashMap Bucket interface
> Simplify HashMap Bucket interface
>
> * Store capacity_mask instead of capacity
> * Move bucket index into RawBucket
> * Valid bucket index is now always within [0..table_capacity)
> * Simplify iterators by moving logic into RawBuckets
> * Clone RawTable using RawBucket
> * Make retain aware of the number of elements
The idea was to put idx in RawBucket instead of the other Bucket types and simplify next() and prev() as much as possible. The rest was a side-effect of that change, except maybe the last 2.
This change makes iteration and other next/prev() heavy operations noticeably faster. Clone is way faster.
```
➜ hashmap2 git:(adapt) ✗ cargo benchcmp pre:: adp:: bench.txt
name pre:: ns/iter adp:: ns/iter diff ns/iter diff %
clone_10_000 74,364 39,736 -34,628 -46.57%
grow_100_000 8,343,553 8,233,785 -109,768 -1.32%
grow_10_000 817,825 723,958 -93,867 -11.48%
grow_big_value_100_000 18,418,979 17,906,186 -512,793 -2.78%
grow_big_value_10_000 1,219,242 1,103,334 -115,908 -9.51%
insert_1000 74,546 58,343 -16,203 -21.74%
insert_100_000 6,743,770 6,238,017 -505,753 -7.50%
insert_10_000 798,079 719,123 -78,956 -9.89%
insert_1_000_000 275,215,605 266,975,875 -8,239,730 -2.99%
insert_int_bigvalue_10_000 1,517,387 1,419,838 -97,549 -6.43%
insert_str_10_000 316,179 278,896 -37,283 -11.79%
insert_string_10_000 770,927 747,449 -23,478 -3.05%
iter_keys_100_000 386,099 333,104 -52,995 -13.73%
iterate_100_000 387,320 355,707 -31,613 -8.16%
lookup_100_000 206,757 193,063 -13,694 -6.62%
lookup_100_000_unif 219,366 193,180 -26,186 -11.94%
lookup_1_000_000 206,456 205,716 -740 -0.36%
lookup_1_000_000_unif 659,934 629,659 -30,275 -4.59%
lru_sim 20,194,334 18,442,149 -1,752,185 -8.68%
merge_shuffle 1,168,044 1,063,055 -104,989 -8.99%
```
Note 2: I may have messed up porting the diff, let's see what CI says.
Properly adjust filenames when multiple emissions
Fixes#40993
Should backport just fine to beta but not sure if we want to do this since this is quite old stable regression.
travis: Update sccache binaries
I've tracked down what I believe is the last spurious sccache failure on #40240
to behavior in mio (carllerche/mio#583), and this commit updates the binaries to
a version which has that fix incorporated.
Do not recommend private fields called as method
```rust
error: no method named `dog_age` found for type `animal::Dog` in the current scope
--> $DIR/private-field.rs:26:23
|
26 | let dog_age = dog.dog_age();
| ^^^^^^^ private field, not a method
```
Fix#27654.
Revert "Implement AsRawFd/IntoRawFd for RawFd"
This reverts commit 2cf686f2cdd6446a3cd47df0305ead40fabe85df (#40842)
RawFd is a type alias for c_int, which is itself a type alias for i32.
As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds
them for i32.
As a result, the reverted commit makes this valid:
```
use std::os::unix::io::AsRawFd;
fn arf<T: AsRawFd>(_: T) {}
fn main() {
arf(32i32)
}
```
Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both
those traits that their methods return a valid RawFd.
r? @aturon
cc @Mic92 @kamalmarhubi
Fixed typo in doc comments for swap_remove
While reading the Vec docs, I came across the docs for swap_remove. I believe there is a typo in the comment and ```return``` should be ```returns```. This PR fixes this issue.
I also feel that the entire doc comment is a bit of a run-on and could be changed to something along the lines of ```Removes an element from anywhere in the vector and returns it. The vector is mutated and the removed element is replaced by the last element of the vector. ```
Thoughts?
Added links to types in from_utf8 description
References #29375. Link to types mentioned in the documentation for `from_utf8` (`str`, `&[u8`], etc). Paragraphs were reformatted to keep any one line from being excessively long, but are otherwise unchanged.
Added links to from_utf8 methods in Utf8Error
Referencing #29375. Linked the `from_utf8` methods for both `String` and `str` in the description. Also linked the `u8` to its documentation
Add links and some examples to std::sync::mpsc docs
Addresses part of #29377
r? @steveklabnik
I took a stab at adding links to the `std::sync::mpsc` docs, and I also wrote a few examples.
Edit: Whoops, typed in `?r` instead of `r?`.
rustc: Stabilize the `#![windows_subsystem]` attribute
This commit stabilizes the `#![windows_subsystem]` attribute which is a
conservative exposure of the `/SUBSYSTEM` linker flag on Widnows platforms. This
is useful for creating applications as well as console programs.
Closes#37499
Point at last valid token on failed `expect_one_of`
```rust
error: expected one of `.`, `;`, `?`, `}`, or an operator, found `)`
--> $DIR/token-error-correct-3.rs:29:9
|
25 | foo()
| - expected one of `.`, `;`, `?`, `}`, or an operator after this
...
29 | } else {
| ^ unexpected token
```
Fix#32540.
I've tracked down what I believe is the last spurious sccache failure on #40240
to behavior in mio (carllerche/mio#583), and this commit updates the binaries to
a version which has that fix incorporated.
* Store capacity_mask instead of capacity
* Move bucket index into RawBucket
* Bucket index is now always within [0..table_capacity)
* Clone RawTable using RawBucket
* Simplify iterators by moving logic into RawBuckets
* Make retain aware of the number of elements
travis: Split all dist builders in two
Previously we would use one builder on Travis to produce two sets of host
compilers for two different targets. Unfortunately though we've recently
increased how much we're building for each target so this is starting to take
unnecessarily long (#40804). This commit splits the dist builders in two by
ensuring that we only dist one target on each builder, which should take a much
shorter amount of time. This should also unblock other work such as landing the
RLS (#40584).
Previously we would use one builder on Travis to produce two sets of host
compilers for two different targets. Unfortunately though we've recently
increased how much we're building for each target so this is starting to take
unnecessarily long (#40804). This commit splits the dist builders in two by
ensuring that we only dist one target on each builder, which should take a much
shorter amount of time. This should also unblock other work such as landing the
RLS (#40584).
This reverts commit 2cf686f2cdd6446a3cd47df0305ead40fabe85df (#40842)
RawFd is a type alias for c_int, which is itself a type alias for i32.
As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds
them for i32.
As a result, the reverted commit makes this valid:
```
use std::os::unix::io::AsRawFd;
fn arf<T: AsRawFd>(_: T) {}
fn main() {
arf(32i32)
}
```
Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both
those traits that their methods return a valid RawFd.
r? @aturon
cc @Mic92 @kamalmarhubi
