tangent/lume
1
0
Fork 0
mirror of https://github.com/TangentFoxy/lume.git synced 2024-12-13 17:24:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Removed function in lume.slice()

Browse Source 
Moved the function index() from lume.slice()'s body to local var
absindex, this improves the performance of lume.slice() on luajit
significantly and improves it to a lesser extent on non-jit lua.
This commit is contained in:
rxi 2014-04-01 12:17:55 +01:00
parent 94977b4f7e
commit 335b928cae
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
lume.lua
View File

@ -27,6 +27,10 @@ local patternescape = function(str)
return str:gsub("[%(%)%.%%%+%-%*%?%[%]%^%$]", "%%%1") return str:gsub("[%(%)%.%%%+%-%*%?%[%]%^%$]", "%%%1")
end end
local absindex = function(len, i)
return i < 0 and (len + i + 1) or i
end
function lume.clamp(x, min, max) function lume.clamp(x, min, max)
return x < min and min or (x > max and max or x) return x < min and min or (x > max and max or x)
@ -194,9 +198,8 @@ end
function lume.slice(t, i, j) function lume.slice(t, i, j)
local function index(x) return x < 0 and (#t + x + 1) or x end i = i and absindex(#t, i) or 1
i = i and index(i) or 1 j = j and absindex(#t, j) or #t
j = j and index(j) or #t
local rtn = {} local rtn = {}
for i = math_max(i, 1), math_min(j, #t) do for i = math_max(i, 1), math_min(j, #t) do
rtn[#rtn + 1] = t[i] rtn[#rtn + 1] = t[i]