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 <
[email protected]>
-- 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: