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aafea36235
Previous benchmark require fix wasn't actually working correctly for the old style require (or running in Lua).
82 lines
No EOL
2.8 KiB
Lua
82 lines
No EOL
2.8 KiB
Lua
local function prequire(name) local success, result = pcall(require, name); return if success then result else nil end
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local bench = script and require(script.Parent.bench_support) or prequire("bench_support") or require("../bench_support")
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function test()
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local base64 = {}
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local extract = bit32.extract
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function base64.makeencoder( s62, s63, spad )
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local encoder = {}
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for b64code, char in pairs{[0]='A','B','C','D','E','F','G','H','I','J',
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'K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y',
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'Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n',
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'o','p','q','r','s','t','u','v','w','x','y','z','0','1','2',
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'3','4','5','6','7','8','9',s62 or '+',s63 or'/',spad or'='} do
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encoder[b64code] = char:byte()
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end
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return encoder
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end
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function base64.makedecoder( s62, s63, spad )
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local decoder = {}
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for b64code, charcode in pairs( base64.makeencoder( s62, s63, spad )) do
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decoder[charcode] = b64code
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end
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return decoder
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end
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local DEFAULT_ENCODER = base64.makeencoder()
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local DEFAULT_DECODER = base64.makedecoder()
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local char, concat, byte = string.char, table.concat, string.byte
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function base64.decode( b64, decoder, usecaching )
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decoder = decoder or DEFAULT_DECODER
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local cache = usecaching and {}
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local t, k = {}, 1
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local n = #b64
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local padding = b64:sub(-2) == '==' and 2 or b64:sub(-1) == '=' and 1 or 0
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for i = 1, padding > 0 and n-4 or n, 4 do
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local a, b, c, d = byte( b64, i, i+3 )
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local s
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if usecaching then
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local v0 = a*0x1000000 + b*0x10000 + c*0x100 + d
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s = cache[v0]
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if not s then
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local v = decoder[a]*0x40000 + decoder[b]*0x1000 + decoder[c]*0x40 + decoder[d]
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s = char( extract(v,16,8), extract(v,8,8), extract(v,0,8))
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cache[v0] = s
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end
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else
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local v = decoder[a]*0x40000 + decoder[b]*0x1000 + decoder[c]*0x40 + decoder[d]
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s = char( extract(v,16,8), extract(v,8,8), extract(v,0,8))
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end
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t[k] = s
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k = k + 1
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end
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if padding == 1 then
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local a, b, c = byte( b64, n-3, n-1 )
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local v = decoder[a]*0x40000 + decoder[b]*0x1000 + decoder[c]*0x40
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t[k] = char( extract(v,16,8), extract(v,8,8))
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elseif padding == 2 then
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local a, b = byte( b64, n-3, n-2 )
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local v = decoder[a]*0x40000 + decoder[b]*0x1000
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t[k] = char( extract(v,16,8))
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end
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return concat( t )
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end
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local ts0 = os.clock()
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for i = 1, 2000 do
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base64.decode("TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlzIHNpbmd1bGFyIHBhc3Npb24gZnJvbSBvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2YgdGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodCBpbiB0aGUgY29udGludWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRoZSBzaG9ydCB2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4=")
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end
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local ts1 = os.clock()
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return ts1 - ts0
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end
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bench.runCode(test, "base64") |