Moved variant.d to dyaml/std/variant. Profile build doesn't inline anymore (made profiling too difficult). More optimizations, speedup (parsing only).

cdc.d

@@ -155,8 +155,8 @@ void main(string[] args)
     if(args.length > 0 && args[$ - 1][0] != '-'){target = args[$ - 1];}
 
     string[] dbg      = ["-debug", "-gc"];
-    string[] optimize = ["-O", "-inline", "-release"];
-    string[] profile  = ["-O", "-inline", "-release", "-gc"];
+    string[] optimize = ["-O", "-inline", "-release", "-noboundscheck"];
+    string[] profile  = ["-O", "-release", "-noboundscheck", "-gc"];
     string[] lib_src  = ["dyaml/", "yaml.d"];
 
     void compile_(string[] args, string[] files)

dyaml/parser.d

@@ -219,7 +219,7 @@ final class Parser
             if(!currentEvent_.isNull)
             {
                 immutable Event result = currentEvent_;
-                clear(currentEvent_);
+                currentEvent_.id = EventID.Invalid;
                 return result;
             }
             assert(false, "No event left to get");

dyaml/queue.d

@@ -185,7 +185,7 @@ T* allocate(T, Args...)(Args args)
     T* ptr = cast(T*)malloc(T.sizeof);
     *ptr = T(args);
     //The struct might contain references to GC-allocated memory, so tell the GC about it.
-    if(hasIndirections!T){GC.addRange(cast(void*)ptr, T.sizeof);}
+    static if(hasIndirections!T){GC.addRange(cast(void*)ptr, T.sizeof);}
     return ptr;
 }
 
@@ -193,8 +193,8 @@ T* allocate(T, Args...)(Args args)
 void free(T)(T* ptr)
 {
     //GC doesn't need to care about any references in this struct anymore.
-    if(hasIndirections!T){GC.removeRange(cast(void*)ptr);}
-    clear(*ptr);
+    static if(hasIndirections!T){GC.removeRange(cast(void*)ptr);}
+    static if(hasMember!(T, "__dtor")){clear(*ptr);}
     std.c.stdlib.free(ptr);
 }
 

dyaml/reader.d

@@ -170,22 +170,36 @@ final class Reader
          *
          * Params:  length = Number of characters to get.
          *
-         * Returns: Characters starting at current position.
-         *
-         * Throws:  ReaderException if trying to read past the end of the stream
-         *          or if invalid data is read.
+         * Returns: Characters starting at current position or an empty slice if out of bounds.
          */
-        dstring prefix(in size_t length)
+        const(dstring) prefix(in size_t length)
         {
-            if(length == 0){return "";}
-            if(buffer_.length <= bufferOffset_ + length)
-            {
-                updateBuffer(length);
+            return slice(0, 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
-            return cast(dstring)buffer_[bufferOffset_ .. end];
+
+        /**
+         * Get a slice view of the internal buffer.
+         *
+         * Note: This gets only a "view" into the internal buffer,
+         *       which WILL get invalidated after other Reader calls.
+         *
+         * Params:  start = Start of the slice relative to current position.
+         *          end   = End of the slice relative to current position.
+         *
+         * Returns: Slice into the internal buffer or an empty slice if out of bounds.
+         */
+        const(dstring) slice(size_t start, size_t end)
+        {
+            if(buffer_.length <= bufferOffset_ + end)
+            {
+                updateBuffer(end);
+            }
+            end += bufferOffset_;
+            start += bufferOffset_;
+            end = min(buffer_.length, end);
+            if(end <= start){return "";}
+
+            return cast(dstring)buffer_[start .. end];
         }
 
         /**
@@ -275,7 +289,7 @@ final class Reader
          * If there are not enough characters in the stream, it will get
          * as many as possible.
          *
-         * Params:  length = Mimimum number of characters we need to read.
+         * Params:  length = Number of characters we need to read.
          *
          * Throws:  ReaderException if trying to read past the end of the stream
          *          or if invalid data is read.
@@ -324,7 +338,7 @@ final class Reader
             ///Get next character from the stream.
             dchar getDChar()
             {
-                switch(encoding_)
+                final switch(encoding_)
                 {
                     case Encoding.UTF_8:
                         //Temp buffer for moving data in rawBuffer8_.
@@ -389,7 +403,6 @@ final class Reader
                         available_ -= 4;
                         stream_.read(result);
                         return result;
-                    default: assert(false);
                 }
             }
 

dyaml/scanner.d

@@ -15,6 +15,7 @@ import core.stdc.string;
 
 import std.algorithm;
 import std.array;
+import std.container;
 import std.conv;
 import std.ascii : isAlphaNum, isDigit, isHexDigit;
 import std.exception;
@@ -123,7 +124,7 @@ final class Scanner
         ///Current indentation level.
         int indent_ = -1;
         ///Past indentation levels. Used as a stack.
-        int[] indents_;
+        Array!int indents_;
 
         ///Processed tokens not yet emitted. Used as a queue.
         Queue!Token tokens_;
@@ -164,7 +165,6 @@ final class Scanner
         {
             clear(tokens_);
             clear(indents_);
-            indents_ = null;
             clear(possibleSimpleKeys_);
             possibleSimpleKeys_ = null;
             clear(appender_);
@@ -404,7 +404,7 @@ final class Scanner
             while(indent_ > column)
             {
                 indent_ = indents_.back;
-                indents_.popBack();
+                indents_.length = indents_.length - 1;
                 tokens_.push(blockEndToken(reader_.mark, reader_.mark));
             }
         }
@@ -779,7 +779,6 @@ final class Scanner
                      (c == '-' || (flowLevel_ == 0 && "?:"d.canFind(c))));
         }
 
-
         ///Move to the next non-space character.
         void findNextNonSpace()
         {
@@ -1266,13 +1265,23 @@ final class Scanner
 
                 mixin FastCharSearch!" \t\0\n\r\u0085\u2028\u2029\'\"\\"d search;
 
-                while(!search.canFind(c))
+                //This is an optimized way of writing:
+                //while(!search.canFind(reader_.peek(length))){++length;}
+                outer: for(;;)
                 {
+                    const slice = reader_.slice(length, length + 32);
+                    enforce(slice.length > 0, 
+                            new Error("While reading a flow scalar", startMark,
+                                      "reached end of file", reader_.mark));
+                    foreach(ch; slice)
+                    {
+                        if(search.canFind(ch)){break outer;}
                         ++length;
-                    c = reader_.peek(length);
+                    }
                 }
 
-                if(length > 0){appender_.put(reader_.get(length));}
+                appender_.put(reader_.prefix(length));
+                reader_.forward(length);
 
                 c = reader_.peek();
                 if(quotes == ScalarStyle.SingleQuoted && 
@@ -1338,14 +1347,15 @@ final class Scanner
         {
             uint length = 0;
             while(" \t"d.canFind(reader_.peek(length))){++length;}
-            const whitespaces = reader_.get(length);
+            const whitespaces = reader_.prefix(length + 1);
 
-            dchar c = reader_.peek();
+            const c = whitespaces[$ - 1];
             enforce(c != '\0', new Error("While scanning a quoted scalar", startMark, 
                                          "found unexpected end of stream", reader_.mark));
 
             if("\n\r\u0085\u2028\u2029"d.canFind(c))
             {
+                reader_.forward(length);
                 const lineBreak = scanLineBreak();
                 const breaks = scanFlowScalarBreaks(startMark);
 
@@ -1353,7 +1363,11 @@ final class Scanner
                 else if(breaks.length == 0){appender_.put(' ');}
                 appender_.put(breaks);
             }
-            else{appender_.put(whitespaces);}
+            else
+            {
+                appender_.put(whitespaces[0 .. $ - 1]);
+                reader_.forward(length);
+            }
         }
 
         ///Scan line breaks in a flow scalar.