Performance Tool(7)Improve Lua and Wrk

Performance Tool(7)Improve Lua and Wrk

 

Basic Lua Language

On intellij, we have the lua plugins. So we need to run the hello.lua as follow:

[Edit the Configuration] ——> [Lua Interpreter] —> /usr/local/bin/lua ——> [Working Directory] —> /Users/carl/work/easy/easylua/src/main/lua

 

It is great to have Lua Scripts.

Script to do base64, base64.lua I get it from github.

-- Lua 5.1+ base64 v3.0 (c) 2009 by Alex Kloss <[e-mail]>

-- licensed under the terms of the LGPL2

 

-- character table string

local b='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'

 

-- encoding

function enc(data)

    return ((data:gsub('.', function(x)

        local r,b='',x:byte()

        for i=8,1,-1 do r=r..(b%2^i-b%2^(i-1)>0 and '1' or '0') end

        return r;

    end)..'0000'):gsub('%d%d%d?%d?%d?%d?', function(x)

        if (#x < 6) then return '' end

        local c=0

        for i=1,6 do c=c+(x:sub(i,i)=='1' and 2^(6-i) or 0) end

        return b:sub(c+1,c+1)

    end)..({ '', '==', '=' })[#data%3+1])

end

 

-- decoding

function dec(data)

    data = string.gsub(data, '[^'..b..'=]', '')

    return (data:gsub('.', function(x)

        if (x == '=') then return '' end

        local r,f='',(b:find(x)-1)

        for i=6,1,-1 do r=r..(f%2^i-f%2^(i-1)>0 and '1' or '0') end

        return r;

    end):gsub('%d%d%d?%d?%d?%d?%d?%d?', function(x)

        if (#x ~= 8) then return '' end

        local c=0

        for i=1,8 do c=c+(x:sub(i,i)=='1' and 2^(7-i) or 0) end

        return string.char(c)

    end))

end

 

return {

    dec = dec,

    enc = enc

}

 

The fileutil.lua, I take some references and write it follow the pattern

--

-- Created by IntelliJ IDEA.

-- User: carl

-- Date: 1/16/15

-- Time: 3:10 PM

-- To change this template use File | Settings | File Templates.

--

-- Opens a file in read

function appendResult(filename,append)

    -- Opens a file in append mode

    file = io.open(filename, "a")

    -- sets the default output file as test.lua

    io.output(file)

    -- appends a word test to the last line of the file

    io.write(append .. '\n')

    -- closes the open file

    io.close(file)

end

 

return {

    appendResult = appendResult

}

 

datetimeutil.lua, I google and find it as references:

 

function format_time(timestamp, format, tzoffset, tzname)

    if tzoffset == "local" then  -- calculate local time zone (for the server)

    local now = os.time()

    local local_t = os.date("*t", now)

    local utc_t = os.date("!*t", now)

    local delta = (local_t.hour - utc_t.hour)*60 + (local_t.min - utc_t.min)

    local h, m = math.modf( delta / 60)

    tzoffset = string.format("%+.4d", 100 * h + 60 * m)

    end

    tzoffset = tzoffset or "GMT"

    format = format:gsub("%%z", tzname or tzoffset)

    if tzoffset == "GMT" then

        tzoffset = "+0000"

    end

    tzoffset = tzoffset:gsub(":", "")

 

    local sign = 1

    if tzoffset:sub(1,1) == "-" then

        sign = -1

        tzoffset = tzoffset:sub(2)

    elseif tzoffset:sub(1,1) == "+" then

        tzoffset = tzoffset:sub(2)

    end

    tzoffset = sign * (tonumber(tzoffset:sub(1,2))*60 +

            tonumber(tzoffset:sub(3,4)))*60

    return os.date(format, timestamp + tzoffset)

end

 

return {

    format_time = format_time

}

 

urlencode.lua class

function urlencode(str)

    if (str) then

        str = string.gsub (str, "\n", "\r\n")

        str = string.gsub (str, "([*+@/{\":,])",

            function (c) return string.format ("%%%02X", string.byte(c)) end)

        str = string.gsub (str, "(})",

            function (c) return string.format ("%%%02X", string.byte(c)) end)

        str = string.gsub (str, " ", "+")

    end

    return str

end

 

sha2.lua

--

-- Le SHA2 Library

--

 

local bit = require("libbit");

 

--- Round constants

-- computed as the fractional parts of the cuberoots of the first 64 primes

local k256 = {

   0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,

   0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,

   0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,

   0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,

   0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,

   0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,

   0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,

   0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,

   0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,

   0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,

   0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,

   0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,

   0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,

   0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,

   0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,

   0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,

}

 

--- Preprocess input message

local function preprocess256(input)

     local length = #input;     -- length in bits

     local padding = 64 - ((length + 9) % 64);

     input = input .. "\128" .. ("\0"):rep(padding) .. "\0\0\0\0" ..

             bit.int32_str(length*8);

     return input;

end

 

--- Process an individual block using SHA256

-- Note: Lua arrays start at 1, not 0.

--       This behavior is respected in loop counters.

--

--@param `input` is the original input message

--@param `t` is the position of the first byte of this block

--@param `H` is the internal hash state

local function digest_block256(input, t, H)

     local s10;     -- Using 1 var for s0,s1 to help LuaJIT register alloc

     local t1, t2;

     local chmaj;     -- May be used in place of s0

     local word;

     local a, b, c, d, e, f, g, h;

     local k = k256;

 

     local band, bnot, bxor, ror = bit.band, bit.bnot, bit.bxor, bit.ror

     local rshift = bit.rshift;

     local limit = 2^32;

 

     local W = {};

     local int32 = bit.str_int32;

     local chunk;

     local c1 = 0;     -- #W, #words

 

     chunk = input:sub(t, t + 63);

     c1 = 0;

     for i = 1, 64, 4 do

          c1 = c1 + 1;

          W[c1] = int32(chunk:sub(i, i+3));

     end

 

     -- Extend 16 words into 64

     for t = 17, 64 do

          word  = W[t - 2];

          s10   = bxor(ror(word, 17), ror(word, 19), rshift(word, 10));

          word  = W[t - 15];

          chmaj = bxor(ror(word, 7), ror(word, 18), rshift(word, 3));

          W[t]  = s10 + W[t - 7] + chmaj + W[t - 16];

     end

 

     a, b, c, d = H[1], H[2], H[3], H[4];

     e, f, g, h = H[5], H[6], H[7], H[8];

 

     for t = 1, 64 do

          s10   = bxor(ror(e, 6), ror(e, 11), ror(e, 25));

          chmaj = bxor(band(e, f), band(bnot(e), g));

          t1    = h + s10 + chmaj + k[t] + W[t];

          s10   = bxor(ror(a, 2), ror(a, 13), ror(a, 22));

          chmaj = bxor(band(a, b), band(a, c), band(b, c));

          t2    = s10 + chmaj;

          h = g;

          g = f;

          f = e;

          e = d  + t1;

          d = c;

          c = b;

          b = a;

          a = t1 + t2;

     end

 

     H[1] = (a + H[1]) % limit;

     H[2] = (b + H[2]) % limit;

     H[3] = (c + H[3]) % limit;

     H[4] = (d + H[4]) % limit;

     H[5] = (e + H[5]) % limit;

     H[6] = (f + H[6]) % limit;

     H[7] = (g + H[7]) % limit;

     H[8] = (h + H[8]) % limit;

end

 

--- Calculate the SHA224 digest of a message

-- Note: sha224() does not use variable names complaint with FIPS 180-2

--@param `input` the message

local function sha224(input)

     local output = "";

     local state;

 

     input  = preprocess256(input);

     state  = {

          0xc1059ed8,

          0x367cd507,

          0x3070dd17,

          0xf70e5939,

          0xffc00b31,

          0x68581511,

          0x64f98fa7,

          0xbefa4fa4,

     };

 

     for i = 1, #input, 64 do

          digest_block256(input, i, state);

     end

 

     for i = 1, 7 do

          output = ("%s%08x"):format(output, state[i]);

     end

 

     return output;

end

 

--- Calculate the SHA256 digest of a message

-- Note: sha256() does not use variable names complaint with FIPS 180-2

--@param `input` the message

local function sha256(input)

     local output = "";

     local state;

 

     input  = preprocess256(input);

     state  = {

          0x6a09e667,

          0xbb67ae85,

          0x3c6ef372,

          0xa54ff53a,

          0x510e527f,

          0x9b05688c,

          0x1f83d9ab,

          0x5be0cd19,

     };

 

     for i = 1, #input, 64 do

          digest_block256(input, i, state);

     end

 

     for i = 1, 8 do

          output = ("%s%08x"):format(output, state[i]);

     end

 

     return output;

end

 

return {

     sha224 = sha224;

     sha256 = sha256;

}

 

I will have all the files in perf.

 

References:

http://sillycat.iteye.com/blog/1460997

http://sillycat.iteye.com/blog/1460991

 

https://github.com/JustAPerson/LuaCrypt

https://github.com/toastdriven/lua-base64

http://www.tutorialspoint.com/lua/lua_file_io.htm

http://lua-users.org/lists/lua-l/2008-08/msg00382.html

http://www.lua.org/pil/22.1.html