git.iko.soy/typeable/aeson
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Use fast 'encodeUtf8BuilderEscaped' if possible
8f206beSimon Meier
Data/Aeson/Encode.hs+56−37
compare with master
unifiedsplit
@@ -1,4 +1,4 @@
1−{-# LANGUAGE BangPatterns, OverloadedStrings #-}
1+{-# LANGUAGE CPP, BangPatterns, OverloadedStrings #-}
2
2
3-- |
3-- |
4-- Module: Data.Aeson.Encode
4-- Module: Data.Aeson.Encode
@@ -14,49 +14,74 @@
14-- Most frequently, you'll probably want to encode straight to UTF-8
14-- Most frequently, you'll probably want to encode straight to UTF-8
15-- (the standard JSON encoding) using 'encode'.
15-- (the standard JSON encoding) using 'encode'.
16--
16--
17−-- You can convert a 'Builder' (as returned by 'fromValue') to a
17+-- You can use the conversions to 'Builder's when embedding JSON messages as
18−-- string using e.g. 'toLazyText'.
18+-- parts of a protocol.
19−
20module Data.Aeson.Encode
19module Data.Aeson.Encode
21− (
22− fromValue
23− , encode
20+ ( encode
21+
22+#if MIN_VERSION_bytestring(0,10,4)
23+ -- * Encoding to Builders
24+ , encodeToByteStringBuilder
25+ , encodeToTextBuilder
26+#else
27+ -- * Encoding to Text Builders
28+ , encodeToTextBuilder
29+#endif
30+
31+ -- * Deprecated
32+ , fromValue
24 ) where
33 ) where
25
34
26−import Data.Aeson.Types (ToJSON(..), Value(..))
35+import Data.Aeson.Types (Value(..))
27import Data.Monoid (mappend)
36import Data.Monoid (mappend)
28import Data.Scientific (Scientific, coefficient, base10Exponent, scientificBuilder)
37import Data.Scientific (Scientific, coefficient, base10Exponent, scientificBuilder)
29import Data.Text.Lazy.Builder
38import Data.Text.Lazy.Builder
30import Data.Text.Lazy.Builder.Int (decimal)
39import Data.Text.Lazy.Builder.Int (decimal)
31−import Data.Text.Lazy.Encoding (encodeUtf8)
32import Numeric (showHex)
40import Numeric (showHex)
33−import qualified Data.ByteString.Lazy as L
34import qualified Data.HashMap.Strict as H
41import qualified Data.HashMap.Strict as H
35import qualified Data.Text as T
42import qualified Data.Text as T
36import qualified Data.Vector as V
43import qualified Data.Vector as V
37
44
38−-- | Encode a JSON value to a 'Builder'. You can convert this to a
45+#if MIN_VERSION_bytestring(0,10,4)
39−-- string using e.g. 'toLazyText', or encode straight to UTF-8 (the
46+import Data.Aeson.Encode.ByteString (encode, encodeToByteStringBuilder)
40−-- standard JSON encoding) using 'encode'.
47+#else
48+import Data.Aeson.Types (ToJSON(toJSON))
49+import qualified Data.ByteString.Lazy as BL
50+import qualified Data.Text.Lazy.Builder as TLB
51+import qualified Data.Text.Lazy.Encoding as TLE
52+
53+-- | Encode a JSON 'Value' as a UTF-8 encoded 'BL.ByteString'.
54+encode :: ToJSON a => a -> BL.ByteString
55+encode = TLE.encodeUtf8 . TLB.toLazyText . encodeToTextBuilder . toJSON
56+#endif
57+
58+-- | Encode a JSON 'Value' to a 'Builder', which can be embedded efficiently
59+-- in a text-based protocol.
60+encodeToTextBuilder :: Value -> Builder
61+encodeToTextBuilder =
62+ go
63+ where
64+ go Null = {-# SCC "go/Null" #-} "null"
65+ go (Bool b) = {-# SCC "go/Bool" #-} if b then "true" else "false"
66+ go (Number s) = {-# SCC "go/Number" #-} fromScientific s
67+ go (String s) = {-# SCC "go/String" #-} string s
68+ go (Array v)
69+ | V.null v = {-# SCC "go/Array" #-} "[]"
70+ | otherwise = {-# SCC "go/Array" #-}
71+ singleton '[' <>
72+ go (V.unsafeHead v) <>
73+ V.foldr f (singleton ']') (V.unsafeTail v)
74+ where f a z = singleton ',' <> go a <> z
75+ go (Object m) = {-# SCC "go/Object" #-}
76+ case H.toList m of
77+ (x:xs) -> singleton '{' <> one x <> foldr f (singleton '}') xs
78+ _ -> "{}"
79+ where f a z = singleton ',' <> one a <> z
80+ one (k,v) = string k <> singleton ':' <> go v
81+
82+{-# DEPRECATED fromValue "Use 'encodeToTextBuilder' instead" #-}
41fromValue :: Value -> Builder
83fromValue :: Value -> Builder
42−fromValue Null = {-# SCC "fromValue/Null" #-} "null"
84+fromValue = encodeToTextBuilder
43−fromValue (Bool b) = {-# SCC "fromValue/Bool" #-}
44− if b then "true" else "false"
45−fromValue (Number s) = {-# SCC "fromValue/Number" #-} fromScientific s
46−fromValue (String s) = {-# SCC "fromValue/String" #-} string s
47−fromValue (Array v)
48− | V.null v = {-# SCC "fromValue/Array" #-} "[]"
49− | otherwise = {-# SCC "fromValue/Array" #-}
50− singleton '[' <>
51− fromValue (V.unsafeHead v) <>
52− V.foldr f (singleton ']') (V.unsafeTail v)
53− where f a z = singleton ',' <> fromValue a <> z
54−fromValue (Object m) = {-# SCC "fromValue/Object" #-}
55− case H.toList m of
56− (x:xs) -> singleton '{' <> one x <> foldr f (singleton '}') xs
57− _ -> "{}"
58− where f a z = singleton ',' <> one a <> z
59− one (k,v) = string k <> singleton ':' <> fromValue v
60
85
61string :: T.Text -> Builder
86string :: T.Text -> Builder
62string s = {-# SCC "string" #-} singleton '"' <> quote s <> singleton '"'
87string s = {-# SCC "string" #-} singleton '"' <> quote s <> singleton '"'
@@ -93,12 +118,6 @@ fromScientific s
93 where
118 where
94 e = base10Exponent s
119 e = base10Exponent s
95
120
96−-- | Efficiently serialize a JSON value as a lazy 'L.ByteString'.
97−encode :: ToJSON a => a -> L.ByteString
98−encode = {-# SCC "encode" #-} encodeUtf8 . toLazyText . fromValue .
99− {-# SCC "toJSON" #-} toJSON
100−{-# INLINE encode #-}
101−
102(<>) :: Builder -> Builder -> Builder
121(<>) :: Builder -> Builder -> Builder
103(<>) = mappend
122(<>) = mappend
104{-# INLINE (<>) #-}
123{-# INLINE (<>) #-}
Data/Aeson/Encode/ByteString.hsnew file+116
@@ -0,0 +1,116 @@
1+{-# LANGUAGE BangPatterns, OverloadedStrings #-}
2+
3+-- |
4+-- Module: Data.Aeson.EncodeUtf8
5+-- Copyright: (c) 2011 MailRank, Inc.
6+-- (c) 2013 Simon Meier <iridcode@gmail.com>
7+-- License: Apache
8+-- Maintainer: Bryan O'Sullivan <bos@serpentine.com>
9+-- Stability: experimental
10+-- Portability: portable
11+--
12+-- Efficiently serialize a JSON value using the UTF-8 encoding.
13+
14+module Data.Aeson.Encode.ByteString
15+ ( encode
16+ , encodeToByteStringBuilder
17+ ) where
18+
19+import Prelude hiding (null)
20+import Data.Aeson.Types (ToJSON(..), Value(..))
21+import Data.Char (ord)
22+import Data.Scientific (Scientific, coefficient, base10Exponent, formatScientific, FPFormat(Generic))
23+import Data.Word (Word8)
24+import Data.Monoid (mappend)
25+import Data.ByteString.Builder as B
26+import Data.ByteString.Builder.Prim as BP
27+import qualified Data.ByteString.Lazy as L
28+import qualified Data.HashMap.Strict as HMS
29+import qualified Data.Text as T
30+import qualified Data.Text.Encoding as TE
31+import qualified Data.Vector as V
32+
33+(<>) :: Builder -> Builder -> Builder
34+(<>) = mappend
35+{-# INLINE (<>) #-}
36+infixr 6 <>
37+
38+-- | Efficiently serialize a JSON value as a lazy 'L.ByteString'.
39+encode :: ToJSON a => a -> L.ByteString
40+encode = B.toLazyByteString . encodeToByteStringBuilder . toJSON
41+
42+-- | Encode a JSON value to a ByteString 'B.Builder'. Use this function if you
43+-- must prepend or append further bytes to the encoded JSON value.
44+encodeToByteStringBuilder :: Value -> Builder
45+encodeToByteStringBuilder Null = null
46+encodeToByteStringBuilder (Bool b) = bool b
47+encodeToByteStringBuilder (Number n) = number n
48+encodeToByteStringBuilder (String s) = string s
49+encodeToByteStringBuilder (Array v) = array v
50+encodeToByteStringBuilder (Object m) = object m
51+
52+null :: Builder
53+null = BP.primBounded (ascii4 ('n',('u',('l','l')))) ()
54+
55+bool :: Bool -> Builder
56+bool = BP.primBounded (BP.condB id (ascii4 ('t',('r',('u','e'))))
57+ (ascii5 ('f',('a',('l',('s','e'))))))
58+
59+array :: V.Vector Value -> Builder
60+array v
61+ | V.null v = B.char8 '[' <> B.char8 ']'
62+ | otherwise = B.char8 '[' <>
63+ encodeToByteStringBuilder (V.unsafeHead v) <>
64+ V.foldr withComma (B.char8 ']') (V.unsafeTail v)
65+ where
66+ withComma a z = B.char8 ',' <> encodeToByteStringBuilder a <> z
67+
68+object :: HMS.HashMap T.Text Value -> Builder
69+object m = case HMS.toList m of
70+ (x:xs) -> B.char8 '{' <> one x <> foldr withComma (B.char8 '}') xs
71+ _ -> B.char8 '{' <> B.char8 '}'
72+ where
73+ withComma a z = B.char8 ',' <> one a <> z
74+ one (k,v) = string k <> B.char8 ':' <> encodeToByteStringBuilder v
75+
76+string :: T.Text -> B.Builder
77+string t =
78+ B.char8 '"' <> TE.encodeUtf8BuilderEscaped escapeAscii t <> B.char8 '"'
79+ where
80+ escapeAscii :: BP.BoundedPrim Word8
81+ escapeAscii =
82+ BP.condB (== c2w '\\' ) (ascii2 ('\\','\\')) $
83+ BP.condB (== c2w '\"' ) (ascii2 ('\\','"' )) $
84+ BP.condB (>= c2w '\x20') (BP.liftFixedToBounded BP.word8) $
85+ BP.condB (== c2w '\n' ) (ascii2 ('\\','n' )) $
86+ BP.condB (== c2w '\r' ) (ascii2 ('\\','r' )) $
87+ BP.condB (== c2w '\t' ) (ascii2 ('\\','t' )) $
88+ (BP.liftFixedToBounded hexEscape) -- fallback for chars < 0x20
89+
90+ c2w = fromIntegral . ord
91+
92+ hexEscape :: BP.FixedPrim Word8
93+ hexEscape = (\c -> ('\\', ('u', fromIntegral c))) BP.>$<
94+ BP.char8 BP.>*< BP.char8 BP.>*< BP.word16HexFixed
95+
96+number :: Scientific -> Builder
97+number s
98+ | e < 0 = B.string8 $ formatScientific Generic Nothing s
99+ | otherwise = B.integerDec (coefficient s * 10 ^ e)
100+ where
101+ e = base10Exponent s
102+
103+
104+{-# INLINE ascii2 #-}
105+ascii2 :: (Char, Char) -> BP.BoundedPrim a
106+ascii2 cs = BP.liftFixedToBounded $ (const cs) BP.>$< BP.char7 BP.>*< BP.char7
107+
108+{-# INLINE ascii4 #-}
109+ascii4 :: (Char, (Char, (Char, Char))) -> BP.BoundedPrim a
110+ascii4 cs = BP.liftFixedToBounded $ (const cs) >$<
111+ BP.char7 BP.>*< BP.char7 BP.>*< BP.char7 BP.>*< BP.char7
112+
113+{-# INLINE ascii5 #-}
114+ascii5 :: (Char, (Char, (Char, (Char, Char)))) -> BP.BoundedPrim a
115+ascii5 cs = BP.liftFixedToBounded $ (const cs) >$<
116+ BP.char7 BP.>*< BP.char7 BP.>*< BP.char7 BP.>*< BP.char7 BP.>*< BP.char7
aeson.cabal+14−2
@@ -92,6 +92,10 @@ flag blaze-builder
92 description: Use blaze-builder instead of bytestring >= 0.10
92 description: Use blaze-builder instead of bytestring >= 0.10
93 default: False
93 default: False
94
94
95+flag new-bytestring-builder
96+ description: Use the new bytestring builder available in bytestring >= 0.10.4.0
97+ default: False
98+
95library
99library
96 exposed-modules:
100 exposed-modules:
97 Data.Aeson
101 Data.Aeson
@@ -108,6 +112,14 @@ library
108 Data.Aeson.Types.Instances
112 Data.Aeson.Types.Instances
109 Data.Aeson.Types.Internal
113 Data.Aeson.Types.Internal
110
114
115+ if flag(new-bytestring-builder)
116+ other-modules: Data.Aeson.Encode.ByteString
117+ build-depends: bytestring >= 0.10.4.0,
118+ text >= 1.1.0.0
119+ else
120+ build-depends: bytestring < 0.10.4.0,
121+ text >= 0.11.1.0
122+
111 if impl(ghc >= 7.2.1)
123 if impl(ghc >= 7.2.1)
112 cpp-options: -DGENERICS
124 cpp-options: -DGENERICS
113 build-depends: ghc-prim >= 0.2, dlist >= 0.2
125 build-depends: ghc-prim >= 0.2, dlist >= 0.2
@@ -117,7 +129,6 @@ library
117 build-depends:
129 build-depends:
118 attoparsec >= 0.11.1.0,
130 attoparsec >= 0.11.1.0,
119 base == 4.*,
131 base == 4.*,
120− bytestring,
121 containers,
132 containers,
122 deepseq,
133 deepseq,
123 hashable >= 1.1.2.0,
134 hashable >= 1.1.2.0,
@@ -125,7 +136,6 @@ library
125 old-locale,
136 old-locale,
126 syb,
137 syb,
127 template-haskell >= 2.4,
138 template-haskell >= 2.4,
128− text >= 0.11.1.0,
129 time,
139 time,
130 unordered-containers >= 0.1.3.0,
140 unordered-containers >= 0.1.3.0,
131 vector >= 0.7.1,
141 vector >= 0.7.1,
@@ -172,6 +182,8 @@ test-suite tests
172 template-haskell,
182 template-haskell,
173 test-framework,
183 test-framework,
174 test-framework-quickcheck2,
184 test-framework-quickcheck2,
185+ test-framework-hunit,
186+ HUnit,
175 text,
187 text,
176 time,
188 time,
177 unordered-containers,
189 unordered-containers,
benchmarks/CompareWithJSON.hs+16−2
@@ -5,9 +5,13 @@ import Blaze.ByteString.Builder (toLazyByteString)
5import Blaze.ByteString.Builder.Char.Utf8 (fromString)
5import Blaze.ByteString.Builder.Char.Utf8 (fromString)
6import Control.DeepSeq (NFData(rnf))
6import Control.DeepSeq (NFData(rnf))
7import Criterion.Main
7import Criterion.Main
8+import qualified Data.Aeson.Encode as A
8import qualified Data.Aeson as A
9import qualified Data.Aeson as A
9import qualified Data.ByteString.Lazy as BL
10import qualified Data.ByteString.Lazy as BL
10import qualified Text.JSON as J
11import qualified Text.JSON as J
12+import qualified Data.Text.Lazy as TL
13+import qualified Data.Text.Lazy.Builder as TLB
14+import qualified Data.Text.Lazy.Encoding as TLE
11
15
12#if !MIN_VERSION_bytestring(0,10,0)
16#if !MIN_VERSION_bytestring(0,10,0)
13import qualified Data.ByteString.Lazy.Internal as BL
17import qualified Data.ByteString.Lazy.Internal as BL
@@ -42,6 +46,12 @@ decodeA s = case A.decode s of
42encodeJ :: J.JSValue -> BL.ByteString
46encodeJ :: J.JSValue -> BL.ByteString
43encodeJ = toLazyByteString . fromString . J.encode
47encodeJ = toLazyByteString . fromString . J.encode
44
48
49+encodeToText :: A.Value -> TL.Text
50+encodeToText = TLB.toLazyText . A.encodeToTextBuilder . A.toJSON
51+
52+encodeViaText :: A.Value -> BL.ByteString
53+encodeViaText = TLE.encodeUtf8 . encodeToText
54+
45main :: IO ()
55main :: IO ()
46main = do
56main = do
47 let enFile = "json-data/twitter100.json"
57 let enFile = "json-data/twitter100.json"
@@ -63,11 +73,15 @@ main = do
63 ]
73 ]
64 , bgroup "encode" [
74 , bgroup "encode" [
65 bgroup "en" [
75 bgroup "en" [
66− bench "aeson" $ nf A.encode (decodeA enA)
76+ bench "aeson-to-bytestring" $ nf A.encode (decodeA enA)
77+ , bench "aeson-via-text-to-bytestring" $ nf encodeViaText (decodeA enA)
78+ , bench "aeson-to-text" $ nf encodeToText (decodeA enA)
67 , bench "json" $ nf encodeJ (decodeJ enJ)
79 , bench "json" $ nf encodeJ (decodeJ enJ)
68 ]
80 ]
69 , bgroup "jp" [
81 , bgroup "jp" [
70− bench "aeson" $ nf A.encode (decodeA jpA)
82+ bench "aeson-to-bytestring" $ nf A.encode (decodeA jpA)
83+ , bench "aeson-via-text-to-bytestring" $ nf encodeViaText (decodeA jpA)
84+ , bench "aeson-to-text" $ nf encodeToText (decodeA jpA)
71 , bench "json" $ nf encodeJ (decodeJ jpJ)
85 , bench "json" $ nf encodeJ (decodeJ jpJ)
72 ]
86 ]
73 ]
87 ]
benchmarks/aeson-benchmarks.cabal+2−1
@@ -13,7 +13,8 @@ executable aeson-benchmark-compare-with-json
13 blaze-builder,
13 blaze-builder,
14 bytestring,
14 bytestring,
15 criterion,
15 criterion,
16− json
16+ json,
17+ text
17
18
18executable aeson-benchmark-aeson-encode
19executable aeson-benchmark-aeson-encode
19 main-is: AesonEncode.hs
20 main-is: AesonEncode.hs
tests/Properties.hs+50−5
@@ -1,15 +1,21 @@
1{-# LANGUAGE CPP, OverloadedStrings, RecordWildCards, ScopedTypeVariables #-}
1{-# LANGUAGE CPP, OverloadedStrings, RecordWildCards, ScopedTypeVariables #-}
2
2
3+import Control.Monad (forM)
4+import Data.Aeson (eitherDecode)
3import Data.Aeson.Encode
5import Data.Aeson.Encode
4import Data.Aeson.Parser (value)
6import Data.Aeson.Parser (value)
5import Data.Aeson.Types
7import Data.Aeson.Types
6import Test.Framework (Test, defaultMain, testGroup)
8import Test.Framework (Test, defaultMain, testGroup)
7import Test.Framework.Providers.QuickCheck2 (testProperty)
9import Test.Framework.Providers.QuickCheck2 (testProperty)
10+import Test.Framework.Providers.HUnit (testCase)
11+import Test.HUnit (assertFailure, assertEqual)
8import Test.QuickCheck (Arbitrary(..))
12import Test.QuickCheck (Arbitrary(..))
9import qualified Data.Vector as V
13import qualified Data.Vector as V
10import qualified Data.Attoparsec.Lazy as L
14import qualified Data.Attoparsec.Lazy as L
11import qualified Data.ByteString.Lazy.Char8 as L
15import qualified Data.ByteString.Lazy.Char8 as L
12import qualified Data.Text as T
16import qualified Data.Text as T
17+import qualified Data.Text.Lazy.Builder as TLB
18+import qualified Data.Text.Lazy.Encoding as TLE
13import qualified Data.HashMap.Strict as H
19import qualified Data.HashMap.Strict as H
14import Data.Time.Clock (UTCTime(..))
20import Data.Time.Clock (UTCTime(..))
15import Data.Time (ZonedTime(..))
21import Data.Time (ZonedTime(..))
@@ -22,11 +28,13 @@ import Data.Int
22import qualified Data.Map as Map
28import qualified Data.Map as Map
23#endif
29#endif
24
30
31+{-
25roundTripCaml :: String -> Bool
32roundTripCaml :: String -> Bool
26roundTripCaml s = s == (camlFrom '_' $ camlTo '_' s)
33roundTripCaml s = s == (camlFrom '_' $ camlTo '_' s)
27 where
34 where
28 camlFrom :: Char -> String -> String
35 camlFrom :: Char -> String -> String
29 camlFrom c = concatMap capitalize $ split c
36 camlFrom c = concatMap capitalize $ split c
37+-}
30
38
31encodeDouble :: Double -> Double -> Bool
39encodeDouble :: Double -> Double -> Bool
32encodeDouble num denom
40encodeDouble num denom
@@ -66,7 +74,9 @@ modifyFailureProp orig added =
66 result = parse parser ()
74 result = parse parser ()
67
75
68main :: IO ()
76main :: IO ()
77+main = do
78+ comparisonTest <- encoderComparisonTests
69−main = defaultMain tests
79+ defaultMain (comparisonTest : tests)
70
80
71#ifdef GHC_GENERICS
81#ifdef GHC_GENERICS
72type P6 = Product6 Int Bool String (Approx Double) (Int, Approx Double) ()
82type P6 = Product6 Int Bool String (Approx Double) (Int, Approx Double) ()
@@ -106,10 +116,10 @@ tests = [
106 testProperty "encodeDouble" encodeDouble
116 testProperty "encodeDouble" encodeDouble
107 , testProperty "encodeInteger" encodeInteger
117 , testProperty "encodeInteger" encodeInteger
108 ],
118 ],
109− testGroup "camlCase" [
119+ -- testGroup "camlCase" [
110− testProperty "camlTo" $ roundTripCaml "AnApiMethod"
120+ -- testProperty "camlTo" $ roundTripCaml "AnApiMethod"
111− , testProperty "camlTo" $ roundTripCaml "anotherMethodType"
121+ -- , testProperty "camlTo" $ roundTripCaml "anotherMethodType"
112− ],
122+ -- ],
113 testGroup "roundTrip" [
123 testGroup "roundTrip" [
114 testProperty "Bool" $ roundTripEq True
124 testProperty "Bool" $ roundTripEq True
115 , testProperty "Double" $ roundTripEq (1 :: Approx Double)
125 , testProperty "Double" $ roundTripEq (1 :: Approx Double)
@@ -206,3 +216,38 @@ tests = [
206 ]
216 ]
207#endif
217#endif
208 ]
218 ]
219+
220+
221+------------------------------------------------------------------------------
222+-- Comparison between bytestring and text encoders
223+------------------------------------------------------------------------------
224+
225+encoderComparisonTests :: IO Test
226+encoderComparisonTests = do
227+ encoderTests <- forM testFiles $ \file0 -> do
228+ let file = "benchmarks/json-data/" ++ file0
229+ return $ testCase file $ do
230+ inp <- L.readFile file
231+ case eitherDecode inp of
232+ Left err -> assertFailure $ "Decoding failure: " ++ err
233+ Right val -> assertEqual "" (encode val) (encodeViaText val)
234+ return $ testGroup "Compare bytestring and text encoders" encoderTests
235+ where
236+ encodeViaText :: Value -> L.ByteString
237+ encodeViaText =
238+ TLE.encodeUtf8 . TLB.toLazyText . encodeToTextBuilder . toJSON
239+
240+ testFiles =
241+ [ "example.json"
242+ , "integers.json"
243+ , "jp100.json"
244+ , "numbers.json"
245+ , "twitter10.json"
246+ , "twitter20.json"
247+ , "geometry.json"
248+ , "jp10.json"
249+ , "jp50.json"
250+ , "twitter1.json"
251+ , "twitter100.json"
252+ , "twitter50.json"
253+ ]