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comparison README_VIM9.md @ 31885:cc751d944b7e

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Update runtime files. Commit: https://github.com/vim/vim/commit/be4e01637e71c8d5095c33b9861fd70b41476732 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 2 13:59:48 2023 +0000 Update runtime files.
author Bram Moolenaar <Bram@vim.org>
date Thu, 02 Feb 2023 15:15:06 +0100
parents d4faa2c5211b
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31884:27f905bc04df 31885:cc751d944b7e
1 ![Vim Logo](https://github.com/vim/vim/blob/master/runtime/vimlogo.gif) 1 ![Vim Logo](https://github.com/vim/vim/blob/master/runtime/vimlogo.gif)
2 2
3 # What is Vim9? 3 # What is Vim9?
4 4
5 This is an experimental side of [Vim](https://github.com/vim/vim). 5 This is a new syntax for Vim script that was introduced with Vim 9.0.
6 It explores ways of making Vim script faster and better. 6 It intends making Vim script faster and better.
7 7
8 WARNING: The Vim9 script features are still under development, anything can
9 break!
10 8
11 # Why Vim9? 9 # Why Vim9?
12 10
13 ## 1. FASTER VIM SCRIPT 11 ## 1. FASTER VIM SCRIPT
14 12
15 The third item on the poll results of 2018, after popup windows and text 13 The third item on the poll results of 2018, after popup windows and text
16 properties, is faster Vim script. So how do we do that? 14 properties, both of which have been implemented, is faster Vim script.
15 So how do we do that?
17 16
18 I have been throwing some ideas around, and soon came to the conclusion 17 I have been throwing some ideas around, and soon came to the conclusion
19 that the current way functions are called and executed, with 18 that the current way functions are called and executed, with
20 dictionaries for the arguments and local variables, is never going to be 19 dictionaries for the arguments and local variables, is never going to be
21 very fast. We're lucky if we can make it twice as fast. The overhead 20 very fast. We're lucky if we can make it twice as fast. The overhead
51 That looks very promising! It's just one example, but it shows how much 50 That looks very promising! It's just one example, but it shows how much
52 we can gain, and also that Vim script can be faster than builtin 51 we can gain, and also that Vim script can be faster than builtin
53 interfaces. 52 interfaces.
54 53
55 LuaJit is much faster at Lua-only instructions. In practice the script would 54 LuaJit is much faster at Lua-only instructions. In practice the script would
56 not do something useless as counting but change the text. For example, 55 not do something useless counting, but change the text. For example,
57 reindent all the lines: 56 reindent all the lines:
58 57
59 ``` vim 58 ``` vim
60 let totallen = 0 59 let totallen = 0
61 for i in range(1, 100000) 60 for i in range(1, 100000)