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Optimized dumping performance. Dumping is now about half as fast

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as loading. Also slightly improved loading performance.
Greatly improved performance with very small files. We can now
load 10000 24 byte files in a second, and dump them at the same
speed.
Fixed another FastCharSearch bug.
This commit is contained in:
Ferdinand Majerech 2011-10-25 20:23:44 +02:00
parent 8b995e5061
commit 62f7e2e4df
7 changed files with 98 additions and 54 deletions
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16
dyaml/dumper.d
View file

@ -113,6 +113,18 @@ struct Dumper
}
private:
///Resolver used by default.
static Resolver defaultResolver_;
///Representer used by default.
static Representer defaultRepresenter_;
static this()
{
defaultResolver_ = new Resolver;
defaultRepresenter_ = new Representer;
}
///Resolver to resolve tags.
Resolver resolver_;
///Representer to represent data types.
@ -167,8 +179,8 @@ struct Dumper
///Construct a Dumper writing to a _stream. This is useful to e.g. write to memory.
this(Stream stream)
{
resolver_ = new Resolver();
representer_ = new Representer();
resolver_ = defaultResolver_;
representer_ = defaultRepresenter_;
stream_ = stream;
Anchor.addReference();
TagDirectives.addReference();

63
dyaml/emitter.d
View file

@ -30,6 +30,7 @@ import dyaml.encoding;
import dyaml.escapes;
import dyaml.event;
import dyaml.exception;
import dyaml.fastcharsearch;
import dyaml.flags;
import dyaml.linebreak;
import dyaml.queue;
@ -63,6 +64,9 @@ align(4) struct ScalarAnalysis
"allowSingleQuoted", "allowDoubleQuoted", "allowBlock", "isNull") flags;
}
///Quickly determines if a character is a newline.
private mixin FastCharSearch!"\n\u0085\u2028\u2029"d newlineSearch_;
//Emits YAML events into a file/stream.
struct Emitter
{
@ -365,10 +369,13 @@ struct Emitter
bool eq(ref tagDirective a, ref tagDirective b){return a.handle == b.handle;}
//Add any default tag directives that have not been overriden.
foreach(ref def; defaultTagDirectives_) if(!canFind!eq(tagDirectives_, def))
foreach(ref def; defaultTagDirectives_)
{
if(!std.algorithm.canFind!eq(tagDirectives_, def))
{
tagDirectives_ ~= def;
}
}
const implicit = first && !event_.explicitDocument && !canonical_ &&
YAMLVersion is null && tagDirectives.isNull() &&
@ -1017,15 +1024,18 @@ struct Emitter
foreach(const size_t index, const dchar c; scalar)
{
mixin FastCharSearch!("#,[]{}&*!|>\'\"%@`"d, 128) specialCharSearch;
mixin FastCharSearch!(",?[]{}"d, 128) flowIndicatorSearch;
//Check for indicators.
if(index == 0)
{
//Leading indicators are special characters.
if("#,[]{}&*!|>\'\"%@`"d.canFind(c))
if(specialCharSearch.canFind(c))
{
flowIndicators = blockIndicators = true;
}
if("?:"d.canFind(c))
if(':' == c || '?' == c)
{
flowIndicators = true;
if(followedByWhitespace){blockIndicators = true;}
@ -1038,7 +1048,7 @@ struct Emitter
else
{
//Some indicators cannot appear within a scalar as well.
if(",?[]{}"d.canFind(c)){flowIndicators = true;}
if(flowIndicatorSearch.canFind(c)){flowIndicators = true;}
if(c == ':')
{
flowIndicators = true;
@ -1051,7 +1061,7 @@ struct Emitter
}
//Check for line breaks, special, and unicode characters.
if("\n\u0085\u2028\u2029"d.canFind(c)){lineBreaks = true;}
if(newlineSearch_.canFind(c)){lineBreaks = true;}
if(!(c == '\n' || (c >= '\x20' && c <= '\x7E')) &&
!((c == '\u0085' || (c >= '\xA0' && c <= '\uD7FF') ||
(c >= '\uE000' && c <= '\uFFFD')) && c != '\uFEFF'))
@ -1068,7 +1078,7 @@ struct Emitter
previousSpace = true;
previousBreak = false;
}
else if("\n\u0085\u2028\u2029"d.canFind(c))
else if(newlineSearch_.canFind(c))
{
if(index == 0){leadingBreak = true;}
if(index == scalar.length - 1){trailingBreak = true;}
@ -1081,10 +1091,11 @@ struct Emitter
previousSpace = previousBreak = false;
}
mixin FastCharSearch! "\0\n\r\u0085\u2028\u2029 \t"d spaceSearch;
//Prepare for the next character.
preceededByWhitespace = "\0\n\r\u0085\u2028\u2029 \t"d.canFind(c);
preceededByWhitespace = spaceSearch.canFind(c);
followedByWhitespace = index + 2 >= scalar.length ||
"\0\n\r\u0085\u2028\u2029 \t"d.canFind(scalar[index + 2]);
spaceSearch.canFind(scalar[index + 2]);
}
with(analysis.flags)
@ -1310,14 +1321,14 @@ struct ScalarWriter
}
else if(breaks_)
{
if(!"\n\u0085\u2028\u2029"d.canFind(c))
if(!newlineSearch_.canFind(c))
{
writeStartLineBreak();
writeLineBreaks();
emitter_.writeIndent();
}
}
else if((c == dcharNone || "\' \n\u0085\u2028\u2029"d.canFind(c))
else if((c == dcharNone || "\' "d.canFind(c) || newlineSearch_.canFind(c))
&& startChar_ < endChar_)
{
writeCurrentRange(Flag!"UpdateColumn".yes);
@ -1410,7 +1421,7 @@ struct ScalarWriter
const dchar c = nextChar();
if(breaks_)
{
if(!"\n\u0085\u2028\u2029"d.canFind(c))
if(!newlineSearch_.canFind(c))
{
if(!leadingSpace && c != dcharNone && c != ' ')
{
@ -1433,7 +1444,7 @@ struct ScalarWriter
writeCurrentRange(Flag!"UpdateColumn".yes);
}
}
else if(c == dcharNone || " \n\u0085\u2028\u2029"d.canFind(c))
else if(c == dcharNone || newlineSearch_.canFind(c) || c == ' ')
{
writeCurrentRange(Flag!"UpdateColumn".yes);
if(c == dcharNone){emitter_.writeLineBreak();}
@ -1454,13 +1465,13 @@ struct ScalarWriter
const dchar c = nextChar();
if(breaks_)
{
if(!"\n\u0085\u2028\u2029"d.canFind(c))
if(!newlineSearch_.canFind(c))
{
writeLineBreaks();
if(c != dcharNone){emitter_.writeIndent();}
}
}
else if(c == dcharNone || "\n\u0085\u2028\u2029"d.canFind(c))
else if(c == dcharNone || newlineSearch_.canFind(c))
{
writeCurrentRange(Flag!"UpdateColumn".no);
if(c == dcharNone){emitter_.writeLineBreak();}
@ -1500,14 +1511,14 @@ struct ScalarWriter
}
else if(breaks_)
{
if(!"\n\u0085\u2028\u2029"d.canFind(c))
if(!newlineSearch_.canFind(c))
{
writeStartLineBreak();
writeLineBreaks();
writeIndent(Flag!"ResetSpace".yes);
}
}
else if(c == dcharNone || " \n\u0085\u2028\u2029"d.canFind(c))
else if(c == dcharNone || newlineSearch_.canFind(c) || c == ' ')
{
writeCurrentRange(Flag!"UpdateColumn".yes);
}
@ -1521,8 +1532,15 @@ struct ScalarWriter
{
++endChar_;
endByte_ = nextEndByte_;
return endByte_ < text_.length ? decode(text_, nextEndByte_)
: dcharNone;
if(endByte_ >= text_.length){return dcharNone;}
const c = text_[nextEndByte_];
//c is ascii, no need to decode.
if(c < 0x80)
{
++nextEndByte_;
return c;
}
return decode(text_, nextEndByte_);
}
///Get character at start of the text range.
@ -1555,16 +1573,15 @@ struct ScalarWriter
const last = lastChar(text_, end);
const secondLast = end > 0 ? lastChar(text_, end) : 0;
if(" \n\u0085\u2028\u2029"d.canFind(text_[0]))
if(newlineSearch_.canFind(text_[0]) || text_[0] == ' ')
{
hints[hintsIdx++] = cast(char)('0' + bestIndent);
}
if(!"\n\u0085\u2028\u2029"d.canFind(last))
if(!newlineSearch_.canFind(last))
{
hints[hintsIdx++] = '-';
}
else if(std.utf.count(text_) == 1 ||
"\n\u0085\u2028\u2029"d.canFind(secondLast))
else if(std.utf.count(text_) == 1 || newlineSearch_.canFind(secondLast))
{
hints[hintsIdx++] = '+';
}
@ -1636,7 +1653,7 @@ struct ScalarWriter
void updateBreaks(in dchar c, in Flag!"UpdateSpaces" updateSpaces)
{
if(c == dcharNone){return;}
breaks_ = "\n\u0085\u2028\u2029"d.canFind(c);
breaks_ = newlineSearch_.canFind(c);
if(updateSpaces){spaces_ = c == ' ';}
}

2
dyaml/fastcharsearch.d
View file

@ -89,7 +89,7 @@ string searchCode(dstring chars, uint tableSize)()
code ~= specialChars.length
? " return " ~ specialCharsCode() ~ ";\n"
: " return false";
: " return false;";
code ~= "}\n";
return code;

16
dyaml/loader.d
View file

@ -90,6 +90,18 @@ import dyaml.token;
struct Loader
{
private:
///Resolver used by default.
static Resolver defaultResolver_;
///Constructor used by default.
static Constructor defaultConstructor_;
static this()
{
defaultResolver_ = new Resolver;
defaultConstructor_ = new Constructor;
}
///Reads character data from a stream.
Reader reader_;
///Processes character data to YAML tokens.
@ -138,8 +150,8 @@ struct Loader
reader_ = new Reader(stream);
scanner_ = new Scanner(reader_);
parser_ = new Parser(scanner_);
resolver_ = new Resolver;
constructor_ = new Constructor;
resolver_ = defaultResolver_;
constructor_ = defaultConstructor_;
Anchor.addReference();
TagDirectives.addReference();
}

15
dyaml/reader.d
View file

@ -148,10 +148,12 @@ final class Reader
* or if invalid data is read.
*/
dchar peek(in size_t index = 0)
{
if(buffer_.length <= bufferOffset_ + index + 1)
{
updateBuffer(index + 1);
if(buffer_.length < bufferOffset_ + index + 1)
}
if(buffer_.length <= bufferOffset_ + index)
{
throw new ReaderException("Trying to read past the end of the stream");
}
@ -175,7 +177,10 @@ final class Reader
dstring prefix(in size_t length)
{
if(length == 0){return "";}
if(buffer_.length <= bufferOffset_ + length)
{
updateBuffer(length);
}
const end = min(buffer_.length, bufferOffset_ + length);
//need to duplicate as we change buffer content with C functions
//and could end up with returned string referencing changed data
@ -225,7 +230,11 @@ final class Reader
void forward(size_t length = 1)
{
mixin FastCharSearch!"\n\u0085\u2028\u2029"d search;
if(buffer_.length <= bufferOffset_ + length + 1)
{
updateBuffer(length + 1);
}
while(length > 0)
{
@ -272,8 +281,6 @@ final class Reader
*/
void updateBuffer(in size_t length)
{
if(buffer_.length > bufferOffset_ + length){return;}
//get rid of unneeded data in the buffer
if(bufferOffset_ > 0)
{

10
dyaml/resolver.d
View file

@ -144,8 +144,8 @@ final class Resolver
if(kind == NodeID.Scalar)
{
if(implicit)
{
if(!implicit){return defaultScalarTag_;}
//Get the first char of the value.
size_t dummy;
const dchar first = value.length == 0 ? '\0' : decode(value, dummy);
@ -153,15 +153,11 @@ final class Resolver
auto resolvers = (first in yamlImplicitResolvers_) is null ?
[] : yamlImplicitResolvers_[first];
foreach(resolver; resolvers)
{
//If regexp matches, return tag.
if(!(match(value, resolver[1]).empty))
foreach(resolver; resolvers) if(!(match(value, resolver[1]).empty))
{
return resolver[0];
}
}
}
return defaultScalarTag_;
}
else if(kind == NodeID.Sequence){return defaultSequenceTag_;}

4
dyaml/serializer.d
View file

@ -194,8 +194,8 @@ struct Serializer
{
assert(node.isType!string, "Scalar node type must be string before serialized");
auto value = node.as!string;
const Tag detectedTag = resolver_.resolve(NodeID.Scalar, Tag(null), value, true);
const Tag defaultTag = resolver_.resolve(NodeID.Scalar, Tag(null), value, false);
const detectedTag = resolver_.resolve(NodeID.Scalar, Tag(null), value, true);
const defaultTag = resolver_.resolve(NodeID.Scalar, Tag(null), value, false);
bool isDetected = node.tag_ == detectedTag;
bool isDefault = node.tag_ == defaultTag;