Test patched luajit

00_unpacthed

# unpatched
$ for i in {1..6} ; do time src/luajit test_str.lua $i ; done
1	1000000	8191

real	0m0.197s
user	0m0.196s
sys	0m0.000s
2	500000	8191

real	0m0.169s
user	0m0.164s
sys	0m0.000s
3	100000	8191

real	0m0.677s
user	0m0.664s
sys	0m0.012s
4	10000	8191

real	0m2.997s
user	0m2.992s
sys	0m0.000s
5	10000	8191

real	0m5.133s
user	0m5.124s
sys	0m0.000s
6	300000	8191

real	0m0.163s
user	0m0.160s
sys	0m0.000s

01_patched

# patched
$ for i in {1..6} ; do time src/luajit test_str.lua $i ; done
1	1000000	8191

real	0m0.197s
user	0m0.192s
sys	0m0.000s
2	500000	8191

real	0m0.153s
user	0m0.152s
sys	0m0.000s
3	100000	8191

real	0m0.110s
user	0m0.102s
sys	0m0.000s
4	10000	8191

real	0m0.014s
user	0m0.012s
sys	0m0.000s
5	10000	8191

real	0m0.017s
user	0m0.016s
sys	0m0.000s
6	300000	8191

real	0m0.140s
user	0m0.136s
sys	0m0.000s

02_patched_with_strong_hash

# patched with LUAJIT_SMART_STRING==2
$ for i in {1..6} ; do time src/luajit test_str.lua $i ; done
1	1000000	8191

real	0m0.199s
user	0m0.196s
sys	0m0.000s
2	500000	8191

real	0m0.155s
user	0m0.152s
sys	0m0.000s
3	100000	8191

real	0m0.131s
user	0m0.128s
sys	0m0.000s
4	10000	8191

real	0m0.020s
user	0m0.016s
sys	0m0.000s
5	10000	8191

real	0m0.025s
user	0m0.024s
sys	0m0.000s
6	300000	8191

real	0m0.143s
user	0m0.140s
sys	0m0.000s

test_str.lua

local lng = string.rep('a',128)
local N = ...
N = N and tonumber(N) or 1
local J

local a = {}
if N == 1 then
    J = 1000000
    for j=1,J do
        a[j%8192] = string.format("%08x", j)
    end
elseif N == 2 then
    J = 500000
    for j=1,J do
        a[j%8192] = string.format("%s%08x", lng, j)
    end
elseif N == 3 then
    J = 100000
    for j=1,J do
        a[j%8192] = string.format("%s%08x%s", lng, j, lng)
    end
elseif N == 4 then
    J = 10000
    for j=1,J do
        a[j%8192] = string.format("%s%08x%s%s", lng, j, lng, lng)
    end
elseif N == 5 then
    J = 10000
    for j=1,J do
        a[j%8192] = string.format("%s%s%08x%s", lng, lng, j, lng)
    end
elseif N == 6 then
    J = 300000
    for j=1,J do
        a[j%8192] = string.format("%s%s%s%08x", lng, lng, lng, j)
    end
end
print(N, J, #a)