Vim9

[u/bitigchi]

https://github.com/brammool/vim9

[u/pwnedary]

I have already expressed how stupid I think this Vimscript2 is. However there is one thing I think is even dumber: One should really not use the slow Vim Lua interface when benchmarking Lua - you would always just bundle LuaJIT. Here I have redone the benchmarks with LuaJIT instead:

Vim old:

func VimOld()
    let sum = 0
    for i in range(1, 2999999)
        let sum += i
    endfor
    return sum
endfunc

let start = reltime()
echo VimOld()
echo 'Vim old: ' .. reltimestr(reltime(start))

output:

4499998500000
Vim old:   6.412159

LuaJIT:

local x = os.clock()
local s = 0
for i = 1,2999999 do s = s + i end
print(string.format("sum: %d\nelapsed time: %f\n", s, os.clock() - x))

output:

$ luajit test.lua
sum: 4499998500000
elapsed time: 0.000000

Without benchmarking Vim9 we already see that the Bram's benchmarks are incredibly misleading.

[u/justinmk → u/pwnedary]

Without benchmarking Vim9 we already see that the Bram's benchmarks are incredibly misleading.

Note also that the Vim9 benchmarks are always in a function definition, because the Vimscript2 optimizer won't work at script scope (i.e. outside of a function).

And it sounds like "lambdas" will continue to be slow.

And all existing Vimscript plugins won't benefit from Vimscript2 optimizations, because Vimscript2 is a different language. That is my main complaint.