Re: [ANN] Lua 5.3.0 (work2) now available
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- Subject: Re: [ANN] Lua 5.3.0 (work2) now available
- From: Philipp Janda <siffiejoe@...>
- Date: 2014年3月24日 05:15:49 +0100
Am 21.03.2014 21:44 schröbte Luiz Henrique de Figueiredo:
Lua 5.3.0 (work2) is now available for testing at
http://www.lua.org/work/lua-5.3.0-work2.tar.gz
Enjoy. All feedback welcome. Thanks.
I'm experiencing a strange slowdown in 5.3 when creating lots of
closures. Example script is attached. It runs in under half a second on
5.1 and 5.2, but needs minutes in 5.3 ...
Ubuntu Linux 13.10 on x86_64 in case that matters.
--lhf
Philipp
#!/usr/bin/lua
local N = 1024*128
local loadstring = loadstring or load
local function create_closures( n, i )
local locs = {}
for j = 1, i do
locs[ j ] = "_"..j
end
locs = table.concat( locs, ", " )
local code = [[
local ]] .. locs .. [[ = ...
return function() return ]] .. locs .. [[ end ]]
local f = assert( loadstring( code ) )
local t = {}
for i = 1, n do
if i % 1024 == 0 then print( i ) end
t[ i ] = f()
end
return t
end
local t = create_closures( N, 10 )
collectgarbage()
collectgarbage()
local full = collectgarbage( "count" )
for i = 1, #t do
t[ i ] = false
end
collectgarbage()
collectgarbage()
local clean = collectgarbage( "count" )
print( "closure(10 upvalues):", (full-clean)*1024/N, "bytes" )