Re: Lua 5.1 (work6) now available
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- Subject: Re: Lua 5.1 (work6) now available
- From: Wim Couwenberg <wcou@...>
- Date: 2005年5月19日 16:19:40 +0200
Work 6 performs *much* worse than work 5 (and 5.0.2 even!) on the test
script below (About 70% (!) slower for sumi and about 30% for sumr.)
What's going on?
local function sumi(n, r)
while r > 0 do
n = n + r
r = r - 1
end
return n
end
local function sumr(n, r)
if r > 0 then
return sumr(n + r, r - 1)
end
return n
end
local now = os.clock()
for i = 1, 1000 do sumi(0, 10000) end
now = os.clock() - now
print(string.format("iterative version took %.3f seconds", now))
now = os.clock()
for i = 1, 1000 do sumr(0, 10000) end
now = os.clock() - now
print(string.format("recursive version took %.3f seconds", now))
--
Wim