Performance of LPeg 1.0.2

I have used LPeg 1.0.1 for parsing lua and json for a long time.

Recently I update the LPeg to 1.0.2, and found that the speed of parsing is much slower than it was in 1.0.1 .

I did a test that create a simple json parser to parse a json file for 1000 times, in 1.0.1 it takes abort 0.59 sec and in 1.0.2 it takes abort 1.269 sec.

It seems that the updating just fixes some bugs , so is the performance degradation a necessary cost to fix bugs, or just another bug?

The json file is too large, I have post it in github: https://github.com/sumneko/LuaParser/blob/develop/test/perform/test.json

The test parser is the following code:

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local paser = P

{

V'Value',

Nl = P'\r\n' + S'\r\n',

Sp = S' \t',

Spnl = (V'Sp' + V'Nl')^0,

Bool = P'true' + P'false',

Int = '0' + (P'-'^-1 * R'09'^1),

Float = P'-'^-1 * ('0' + R'09'^1) * '.' * R'09'^0 * V'FloatSuffix'^-1,

Bad = (R'09' + R'az' + R'AZ')^1,

FloatSuffix = S'eE' * P'-'^-1 * R'09'^1,

Null = P'null',

String = '"'

* ('\\' * P(1) + (P(1) - '"'))^0

* '"',

Table = V'Spnl'

* S'[{' * V'Spnl'

* (

V'Object'

+ V'Value'

+ P',' * V'Spnl'

)^0 * V'Spnl'

* S']}' * V'Spnl',

Object = V'Spnl' * V'Key' * V'Spnl' * V'Value' * V'Spnl',

Key = V'String' * V'Spnl' * ':',

Value = V'Table'

+ V'Bool'

+ V'Null'

+ V'String'

+ V'Float'

+ V'Int'

+ V'Bad'

}

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This parser did a pure match, performance has decreased by about 50%.

In practice, the performance has decreased by about 25% due to the need to process the capture results.

Sorry for my bad English.

-- sumneko

(Please! This is not a spam! I have revised this email 25 times!)