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bug#69709: `sort` interface improvement and universal ordering predicate
From: |
Mattias Engdegård |
Subject: |
bug#69709: `sort` interface improvement and universal ordering predicate |
Date: |
Sat, 23 Mar 2024 15:58:52 +0100 |
22 mars 2024 kl. 21.55 skrev Dmitry Gutov <dmitry@gutov.dev>:
> :in-place is not too bad.
Thank you, I'm going with :in-place because :destructive puts emphasis on the
wrong aspect. Sorting in-place has predictable and useful side-effects, in
contrast to the old (pre-timsort) implementation that garbled the input list.
But non-destructive should definitely be the default. All my own experience
(and from observations, that of other people) shows that it's far less
error-prone. This applies to other languages as well, even very imperative ones
like Python.
The branch scratch/sort-key has been updated with polished changes, including
updates of the Lisp manual.
`value-less-p` is now called `value<`. (We could still unify it with `<`,
perhaps.)
A small tweak to the implementation of non-destructive list sorting gave a
speed-up of 1.1x-1.5x, which was surprisingly good. The old code just called
copy-sequence on the input.
An even bigger boost was gained from special-casing the ordering predicate
`value<`: 1.5x-2x speed-up on practically all input. This alone could be worth
all the trouble with the patch series. We could do even better by
special-casing on common key types, such as fixnums.
- bug#69709: `sort` interface improvement and universal ordering predicate, Mattias Engdegård, 2024/03/10
- bug#69709: `sort` interface improvement and universal ordering predicate, Eli Zaretskii, 2024/03/10
- bug#69709: `sort` interface improvement and universal ordering predicate, Mattias Engdegård, 2024/03/10
- bug#69709: `sort` interface improvement and universal ordering predicate, Eshel Yaron, 2024/03/21
- bug#69709: `sort` interface improvement and universal ordering predicate, Dmitry Gutov, 2024/03/22
- bug#69709: `sort` interface improvement and universal ordering predicate,
Mattias Engdegård <=
- bug#69709: `sort` interface improvement and universal ordering predicate, Dmitry Gutov, 2024/03/23
- bug#69709: `sort` interface improvement and universal ordering predicate, Stefan Monnier, 2024/03/23
- bug#69709: `sort` interface improvement and universal ordering predicate, Dmitry Gutov, 2024/03/23
- bug#69709: `sort` interface improvement and universal ordering predicate, Stefan Monnier, 2024/03/23
- bug#69709: `sort` interface improvement and universal ordering predicate, Mattias Engdegård, 2024/03/25
- bug#69709: `sort` interface improvement and universal ordering predicate, Mattias Engdegård, 2024/03/29
- bug#69709: `sort` interface improvement and universal ordering predicate, Daniel Mendler, 2024/03/29
- bug#69709: `sort` interface improvement and universal ordering predicate, Mattias Engdegård, 2024/03/29
- bug#69709: `sort` interface improvement and universal ordering predicate, Eli Zaretskii, 2024/03/29
- bug#69709: `sort` interface improvement and universal ordering predicate, Mattias Engdegård, 2024/03/29