diff --git a/core/encoding/entity/entity.odin b/core/encoding/entity/entity.odin
index 3f3d41953..026937eb8 100644
--- a/core/encoding/entity/entity.odin
+++ b/core/encoding/entity/entity.odin
@@ -25,6 +25,8 @@ import "base:runtime"
 import "core:unicode/utf8"
 import "core:unicode"
 import "core:strings"
+import "core:time"
+import "core:log"
 
 MAX_RUNE_CODEPOINT :: int(unicode.MAX_RUNE)
 
@@ -78,16 +80,75 @@ XML_Decode_Option :: enum u8 {
 }
 XML_Decode_Options :: bit_set[XML_Decode_Option; u8]
 
+_Perf_Meas :: struct {
+	sw: map[_Perf]time.Stopwatch,
+}
+
+_Perf :: enum {
+	set_context,
+	init_builder,
+	advance,
+	cdata,
+	decode_amp,
+	av_normalization,
+	line_ends,
+}
+
+_meas_reset :: proc(m: ^_Perf_Meas) {
+	m.sw = make(map[_Perf]time.Stopwatch, context.temp_allocator)
+	for p in _Perf {
+		m.sw[p] = {}
+	}
+}
+
+_meas_begin :: #force_inline proc(m: ^_Perf_Meas, which: _Perf) {
+	time.stopwatch_start(&m.sw[which])
+}
+
+_meas_end :: #force_inline proc(m: ^_Perf_Meas, which: _Perf) {
+	time.stopwatch_stop(&m.sw[which])
+}
+
+_meas_log :: proc(m: _Perf_Meas) {
+	for p in _Perf {
+		sw := m.sw[p]
+		log.infof("% -35v:  %v", p, time.stopwatch_duration(sw))
+	}
+}
+
+@(thread_local) _decode_xml_meas: _Perf_Meas
+
 // Decode a string that may include SGML/XML/HTML entities.
 // The caller has to free the result.
 decode_xml :: proc(input: string, options := XML_Decode_Options{}, allocator := context.allocator) -> (decoded: string, err: Error) {
+	builder := strings.builder_make(allocator)
+	defer strings.builder_destroy(&builder)
+	decoded, err = decode_xml_sb(&builder, input, options, allocator)
+	decoded = strings.clone(decoded, allocator)
+	return
+}
+
+decode_xml_sb :: proc(builder: ^strings.Builder, input: string, options := XML_Decode_Options{}, allocator := context.allocator) -> (decoded: string, err: Error) {
+	// PERF: Hot
+	m := &_decode_xml_meas
+	_meas_begin(m, .set_context)
 	context.allocator = allocator
+	_meas_end(m, .set_context)
 
 	l := len(input)
 	if l == 0 { return "", .None }
 
-	builder := strings.builder_make()
-	defer strings.builder_destroy(&builder)
+	// PERF: This is a hot path, using an arena allocator here is beneficial.
+	//builder, builder_err := strings.builder_make_len_cap(0, 250, context.temp_allocator)
+	//if builder_err != nil {
+		// Fallback to the provided allocator if no temp allocator is available.
+	//_meas_begin(m, .init_builder)
+	//	builder := strings.builder_make_len_cap(0, 100)
+	//_meas_end(m, .init_builder)
+	//}
+	//defer strings.builder_destroy(&builder)
+
+	string_start_in_builder := len(builder.buf)
 
 	t := Tokenizer{src=input}
 	in_data := false
@@ -95,7 +156,10 @@ decode_xml :: proc(input: string, options := XML_Decode_Options{}, allocator :=
 	prev: rune = ' '
 
 	loop: for {
+		_meas_begin(m, .advance)
 		advance(&t) or_return
+		_meas_end(m, .advance)
+
 		if t.r < 0 { break loop }
 
 		// Below here we're never inside a CDATA tag. At most we'll see the start of one,
@@ -111,40 +175,46 @@ decode_xml :: proc(input: string, options := XML_Decode_Options{}, allocator :=
 				Keep in mind that we could already *be* inside a CDATA tag.
 				If so, write `<` as a literal and continue.
 			*/
+			_meas_begin(m, .cdata)
 			if in_data {
-				write_rune(&builder, '<')
+				write_rune(builder, '<')
 				continue
 			}
-			in_data = _handle_xml_special(&t, &builder, options) or_return
+			in_data = _handle_xml_special(&t, builder, options) or_return
+			_meas_end(m, .cdata)
 
 		case ']':
 			// If we're unboxing _and_ decoding CDATA, we'll have to check for the end tag.
 			if in_data {
+				_meas_begin(m, .cdata)
 				if strings.has_prefix(t.src[t.offset:], CDATA_END) {
 					in_data = false
 					t.read_offset += len(CDATA_END) - 1
 				}
+				_meas_end(m, .cdata)
 				continue
 			} else {
-				write_rune(&builder, ']')
+				write_rune(builder, ']')
 			}
 
 		case:
 			if in_data && .Decode_CDATA not_in options {
 				// Unboxed, but undecoded.
-				write_rune(&builder, t.r)
+				_meas_begin(m, .cdata)
+				write_rune(builder, t.r)
+				_meas_end(m, .cdata)
 				continue
 			}
 
 			if t.r == '&' {
-				if entity, entity_err := _extract_xml_entity(&t); entity_err != .None {
-					// We read to the end of the string without closing the entity. Pass through as-is.
-					write_string(&builder, entity)
-				} else {
+				_meas_begin(m, .decode_amp)
+				defer _meas_end(m, .decode_amp)
+				entity, entity_err := _extract_xml_entity(&t)
+				if entity_err == nil {
 					if .No_Entity_Decode not_in options {
 						if decoded, count, ok := xml_decode_entity(entity); ok {
 							for i in 0..<count {
-								write_rune(&builder, decoded[i])
+								write_rune(builder, decoded[i])
 							}
 							prev = decoded[count - 1]
 							continue
@@ -152,41 +222,51 @@ decode_xml :: proc(input: string, options := XML_Decode_Options{}, allocator :=
 					}
 
 					// Literal passthrough because the decode failed or we want entities not decoded.
-					write_string(&builder, "&")
-					write_string(&builder, entity)
-					write_string(&builder, ";")
+					// PERF: Cold
+					write_string(builder, "&")
+					write_string(builder, entity)
+					write_string(builder, ";")
+				} else {
+					// PERF: Cold
+					// We read to the end of the string without closing the entity. Pass through as-is.
+					write_string(builder, entity)
 				}
 			} else {
 				// Handle AV Normalization: https://www.w3.org/TR/2006/REC-xml11-20060816/#AVNormalize
 				if .Normalize_Whitespace in options {
+					_meas_begin(m, .av_normalization)
 					switch t.r {
 					case ' ', '\r', '\n', '\t':
 						if prev != ' ' {
-							write_rune(&builder, ' ')
+							write_rune(builder, ' ')
 							prev = ' '
 						}
 					case:
-						write_rune(&builder, t.r)
+						write_rune(builder, t.r)
 						prev = t.r
 					}
+					_meas_end(m, .av_normalization)
 				} else {
 					// https://www.w3.org/TR/2006/REC-xml11-20060816/#sec-line-ends
+					_meas_begin(m, .line_ends)
 					switch t.r {
 					case '\n', 0x85, 0x2028:
-						write_rune(&builder, '\n')
+						write_rune(builder, '\n')
 					case '\r': // Do nothing until next character
 					case:
 						if prev == '\r' { // Turn a single carriage return into a \n
-							write_rune(&builder, '\n')
+							write_rune(builder, '\n')
 						}
-						write_rune(&builder, t.r)
+						write_rune(builder, t.r)
 					}
 					prev = t.r
+					_meas_end(m, .line_ends)
 				}
 			}
 		}
 	}
-	return strings.clone(strings.to_string(builder), allocator), err
+	//return strings.clone(strings.to_string(builder), allocator), err
+	return transmute(string)builder.buf[string_start_in_builder:], err
 }
 
 advance :: proc(t: ^Tokenizer) -> (err: Error) {
diff --git a/core/encoding/xml/tokenizer.odin b/core/encoding/xml/tokenizer.odin
index d07f41580..c4ca99507 100644
--- a/core/encoding/xml/tokenizer.odin
+++ b/core/encoding/xml/tokenizer.odin
@@ -129,6 +129,8 @@ error :: proc(t: ^Tokenizer, offset: int, msg: string, args: ..any) {
 
 @(optimization_mode="favor_size")
 advance_rune :: proc(t: ^Tokenizer) {
+	//m := &_parse_bytes_meas
+	//_meas_begin(m, .advance_rune_total)
 	#no_bounds_check {
 		/*
 			Already bounds-checked here.
@@ -162,6 +164,7 @@ advance_rune :: proc(t: ^Tokenizer) {
 			t.ch = -1
 		}
 	}
+	//_meas_end(m, .advance_rune_total)
 }
 
 peek_byte :: proc(t: ^Tokenizer, offset := 0) -> byte {
@@ -172,25 +175,94 @@ peek_byte :: proc(t: ^Tokenizer, offset := 0) -> byte {
 }
 
 @(optimization_mode="favor_size")
+// PERF: warm
 skip_whitespace :: proc(t: ^Tokenizer) {
-	for {
-		switch t.ch {
-		case ' ', '\t', '\r', '\n':
-			advance_rune(t)
-		case:
-			return
+	//m := &_parse_bytes_meas
+	//_meas_begin(m, .skip_whitespace_total)
+	/*
+		Already bounds-checked here.
+	*/
+	/*#no_bounds_check*/ {
+		loop: for {
+			/*if t.ch == ' ' || t.ch == '\t' || t.ch == '\r' {
+				// PERF: Hot.
+				if t.read_offset < len(t.src) {
+					t.offset = t.read_offset
+					c := t.src[t.read_offset]
+					if c < utf8.RUNE_SELF {
+						t.read_offset += 1
+						t.ch = cast(rune)c
+					} else {
+						// PERF: Unlikely.
+						advance_rune(t)
+					}
+				} else {
+					// PERF: Unlikely.
+					advance_rune(t)
+				}
+			} else if t.ch == '\n' {
+				// PERF: Hot.
+				if t.read_offset < len(t.src) {
+					t.offset = t.read_offset
+					t.line_offset = t.offset
+					t.line_count += 1
+					c := t.src[t.read_offset]
+					if c < utf8.RUNE_SELF {
+						t.read_offset += 1
+						t.ch = cast(rune)c
+					} else {
+						// PERF: Unlikely.
+						advance_rune(t)
+					}
+				} else {
+					// PERF: Unlikely.
+					advance_rune(t)
+				}
+			} else {
+				break
+			}*/
+			
+			switch t.ch {
+			case ' ', '\t', '\r', '\n':
+				advance_rune(t)
+			case:
+				break loop
+			}
+			
 		}
 	}
+	//_meas_end(m, .skip_whitespace_total)
+}
+
+_is_letter_map := _is_letter_map_init()
+
+_is_letter_map_init :: proc "contextless" () -> [0x80]bool {
+	m: [0x80]bool
+	assert_contextless(utf8.RUNE_SELF == len(m))
+	m['_'] = true
+	for c in 'A' ..= 'Z' {
+		m[c] = true
+	}
+	for c in 'a' ..= 'z' {
+		m[c] = true
+	}
+	return m
 }
 
 @(optimization_mode="favor_size")
 is_letter :: proc(r: rune) -> bool {
+	// PERF: Warm
 	if r < utf8.RUNE_SELF {
+		//#no_bounds_check {
+		//	if _is_letter_map[r] {
+		//		return true
+		//	}
+		//}
 		switch r {
-		case '_':
-			return true
 		case 'A'..='Z', 'a'..='z':
 			return true
+		case '_':
+			return true
 		}
 	}
 	return unicode.is_letter(r)
@@ -294,6 +366,10 @@ skip_cdata :: proc(t: ^Tokenizer) -> (err: Error) {
 
 @(optimization_mode="favor_size")
 scan_string :: proc(t: ^Tokenizer, offset: int, close: rune = '<', consume_close := false, multiline := true) -> (value: string, err: Error) {
+	//m := &_parse_bytes_meas
+	//_meas_begin(m, .scan_string_total)
+	//defer _meas_end(m, .scan_string_total)
+
 	err = .None
 
 	loop: for {
@@ -352,14 +428,18 @@ scan_string :: proc(t: ^Tokenizer, offset: int, close: rune = '<', consume_close
 	return lit, err
 }
 
-peek :: proc(t: ^Tokenizer) -> (token: Token) {
-	old  := t^
-	token = scan(t)
-	t^ = old
-	return token
+peek :: #force_inline proc(t: ^Tokenizer) -> (token: Token) {
+	m := &_parse_bytes_meas
+	_meas_begin(m, .peek_total)
+	tmp := t^
+	r := scan(&tmp)
+	_meas_end(m, .peek_total)
+	return r
 }
 
 scan :: proc(t: ^Tokenizer, multiline_string := false) -> Token {
+	m := &_parse_bytes_meas
+	_meas_begin(m, .scan_total)
 	skip_whitespace(t)
 
 	offset := t.offset
@@ -367,10 +447,10 @@ scan :: proc(t: ^Tokenizer, multiline_string := false) -> Token {
 	kind: Token_Kind
 	err:  Error
 	lit:  string
-	pos := offset_to_pos(t, offset)
+	pos := #force_inline offset_to_pos(t, offset)
 
 	switch ch := t.ch; true {
-	case is_letter(ch):
+	case #force_inline is_letter(ch):
 		lit = scan_identifier(t)
 		kind = .Ident
 
@@ -411,5 +491,6 @@ scan :: proc(t: ^Tokenizer, multiline_string := false) -> Token {
 	if kind != .String && lit == "" {
 		lit = string(t.src[offset : t.offset])
 	}
+	_meas_end(m, .scan_total)
 	return Token{kind, lit, pos}
 }
diff --git a/core/encoding/xml/xml_reader.odin b/core/encoding/xml/xml_reader.odin
index 6d068466b..c2a839c4b 100644
--- a/core/encoding/xml/xml_reader.odin
+++ b/core/encoding/xml/xml_reader.odin
@@ -15,6 +15,8 @@ import    "core:encoding/entity"
 import    "base:intrinsics"
 import    "core:mem"
 import    "core:strings"
+import    "core:time"
+import    "core:log"
 
 likely :: intrinsics.expect
 
@@ -163,15 +165,79 @@ Error :: enum {
 	Conflicting_Options,
 }
 
+_Perf_Meas :: struct {
+	sw: map[_Perf]time.Stopwatch,
+}
+
+_Perf :: enum {
+	clone_input,
+	elements,
+	attributes,
+	attributes_set_context,
+	attributes_peek,
+	attributes_parse_attribute,
+	attributes_check_duplicates,
+	attributes_append,
+	attributes_skip_whitespace,
+	text_content,
+	cdata,
+	comments,
+	resize_result,
+	peek_total,
+	scan_total,
+	scan_string_total,
+	skip_whitespace_total,
+	advance_rune_total,
+	parse_attribute_set_context,
+	parse_attribute_tokenize_ident,
+	parse_attribute_tokenize_eq,
+	parse_attribute_tokenize_value,
+	parse_attribute_decode,
+	parse_attribute_append,
+}
+
+_meas_reset :: proc(m: ^_Perf_Meas) {
+	m.sw = make(map[_Perf]time.Stopwatch, context.temp_allocator)
+	for p in _Perf {
+		m.sw[p] = {}
+	}
+}
+
+_meas_begin :: #force_inline proc(m: ^_Perf_Meas, which: _Perf) {
+	time.stopwatch_start(&m.sw[which])
+}
+
+_meas_end :: #force_inline proc(m: ^_Perf_Meas, which: _Perf) {
+	time.stopwatch_stop(&m.sw[which])
+}
+
+_meas_log :: proc(m: _Perf_Meas) {
+	for p in _Perf {
+		sw := m.sw[p]
+		log.infof("% -35v:  %v", p, time.stopwatch_duration(sw))
+	}
+}
+
+@(thread_local) _parse_bytes_meas: _Perf_Meas
+
 parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_handler := default_error_handler, allocator := context.allocator) -> (doc: ^Document, err: Error) {
 	data := data
 	context.allocator = allocator
 
 	opts := validate_options(options) or_return
 
+	m := &_parse_bytes_meas
+	_meas_reset(m)
+	defer _meas_log(m^)
+
+	entity._meas_reset(&entity._decode_xml_meas)
+	defer entity._meas_log(entity._decode_xml_meas)
+
 	// If `.Input_May_Be_Modified` is not specified, we duplicate the input so that we can modify it in-place.
 	if .Input_May_Be_Modified not_in opts.flags {
+		_meas_begin(m, .clone_input)
 		data = bytes.clone(data)
+		_meas_end(m, .clone_input)
 	}
 
 	t := new(Tokenizer)
@@ -203,6 +269,7 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 			// NOTE(Jeroen): We're not using a switch because this if-else chain ordered by likelihood is 2.5% faster at -o:size and -o:speed.
 			if likely(open.kind, Token_Kind.Ident) == .Ident {
 				// e.g. <odin - Start of new element.
+				_meas_begin(m, .elements)
 				element = new_element(doc)
 				if element == 0 { // First Element
 					parent = element
@@ -212,8 +279,14 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 
 				doc.elements[element].parent = parent
 				doc.elements[element].ident  = open.text
+				_meas_end(m, .elements)
 
+				_meas_begin(m, .attributes)
+				// PERF: Hot !!
 				parse_attributes(doc, &doc.elements[element].attribs) or_return
+				_meas_end(m, .attributes)
+
+				_meas_begin(m, .elements)
 
 				// If a DOCTYPE is present _or_ the caller
 				// asked for a specific DOCTYPE and the DOCTYPE
@@ -245,8 +318,11 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 					return
 				}
 
+				_meas_end(m, .elements)
+
 			} else if open.kind == .Slash {
 				// Close tag.
+				_meas_begin(m, .elements)
 				ident := expect(t, .Ident) or_return
 				_      = expect(t, .Gt)    or_return
 
@@ -256,6 +332,7 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 				}
 				parent  = doc.elements[element].parent
 				element = parent
+				_meas_end(m, .elements)
 
 			} else if open.kind == .Exclaim {
 				// <!
@@ -290,6 +367,7 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 					// Comment: <!-- -->.
 					// The grammar does not allow a comment to end in --->
 					expect(t, .Dash)
+					_meas_begin(m, .comments)
 					comment := scan_comment(t) or_return
 
 					if .Intern_Comments in opts.flags {
@@ -303,6 +381,7 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 							append(&doc.elements[element].value, el)
 						}
 					}
+					_meas_end(m, .comments)
 
 				case .Open_Bracket:
 					// This could be a CDATA tag part of a tag's body. Unread the `<![`
@@ -312,7 +391,9 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 					// Instead of calling `parse_body` here, we could also `continue loop`
 					// and fall through to the `case:` at the bottom of the outer loop.
 					// This makes the intent clearer.
+					_meas_begin(m, .cdata)
 					parse_body(doc, element, opts) or_return
+					_meas_end(m, .cdata)
 
 				case:
 					error(t, t.offset, "Unexpected Token after <!: %#v", next)
@@ -348,7 +429,9 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 
 		case:
 			// This should be a tag's body text.
+			_meas_begin(m, .text_content)
 			parse_body(doc, element, opts) or_return
+			_meas_end(m, .text_content)
 		}
 	}
 
@@ -360,7 +443,9 @@ parse_bytes :: proc(data: []u8, options := DEFAULT_OPTIONS, path := "", error_ha
 		return doc, .No_DocType
 	}
 
+	_meas_begin(m, .resize_result)
 	resize(&doc.elements, int(doc.element_count))
+	_meas_end(m, .resize_result)
 	return doc, .None
 }
 
@@ -408,7 +493,7 @@ validate_options :: proc(options: Options) -> (validated: Options, err: Error) {
 	return validated, .None
 }
 
-expect :: proc(t: ^Tokenizer, kind: Token_Kind, multiline_string := false) -> (tok: Token, err: Error) {
+expect :: #force_inline proc(t: ^Tokenizer, kind: Token_Kind, multiline_string := false) -> (tok: Token, err: Error) {
 	tok = scan(t, multiline_string=multiline_string)
 	if tok.kind == kind { return tok, .None }
 
@@ -416,18 +501,34 @@ expect :: proc(t: ^Tokenizer, kind: Token_Kind, multiline_string := false) -> (t
 	return tok, .Unexpected_Token
 }
 
-parse_attribute :: proc(doc: ^Document) -> (attr: Attribute, offset: int, err: Error) {
+_parse_attribute :: proc(doc: ^Document, builder: ^strings.Builder) -> (attr: Attribute, offset: int, err: Error) {
 	assert(doc != nil)
+	m := &_parse_bytes_meas
+	_meas_begin(m, .parse_attribute_set_context)
 	context.allocator = doc.allocator
+	_meas_end(m, .parse_attribute_set_context)
 	t := doc.tokenizer
 
+	_meas_begin(m, .parse_attribute_tokenize_ident)
 	key    := expect(t, .Ident)  or_return
-	_       = expect(t, .Eq)     or_return
-	value  := expect(t, .String, multiline_string=true) or_return
+	_meas_end(m, .parse_attribute_tokenize_ident)
 
-	normalized, normalize_err := entity.decode_xml(value.text, {.Normalize_Whitespace}, doc.allocator)
+	_meas_begin(m, .parse_attribute_tokenize_eq)
+	_       = expect(t, .Eq)     or_return
+	_meas_end(m, .parse_attribute_tokenize_eq)
+
+	_meas_begin(m, .parse_attribute_tokenize_value)
+	value  := expect(t, .String, multiline_string=true) or_return
+	_meas_end(m, .parse_attribute_tokenize_value)
+
+	_meas_begin(m, .parse_attribute_decode)
+	//builder := strings.builder_make_len_cap(0, len(value.text) + 10, doc.allocator)
+	normalized, normalize_err := entity.decode_xml_sb(builder, value.text, {.Normalize_Whitespace}, doc.allocator)
+	_meas_end(m, .parse_attribute_decode)
 	if normalize_err == .None {
-		append(&doc.strings_to_free, normalized)
+		//_meas_begin(m, .parse_attribute_append)
+		//append(&doc.strings_to_free, strings.to_string(builder))
+		//_meas_end(m, .parse_attribute_append)
 		value.text = normalized
 	}
 
@@ -445,20 +546,56 @@ check_duplicate_attributes :: proc(t: ^Tokenizer, attribs: Attributes, attr: Att
 			return .Duplicate_Attribute
 		}
 	}
-	return .None	
+	return .None
 }
 
 parse_attributes :: proc(doc: ^Document, attribs: ^Attributes) -> (err: Error) {
 	assert(doc != nil)
-	context.allocator = doc.allocator
+	m := &_parse_bytes_meas
+	_meas_begin(m, .attributes_set_context)
+	context.allocator = doc.allocator // PERF: mildly warmish
+	_meas_end(m, .attributes_set_context)
 	t := doc.tokenizer
 
-	for peek(t).kind == .Ident {
-		attr, offset := parse_attribute(doc)                  or_return
-		check_duplicate_attributes(t, attribs^, attr, offset) or_return
-		append(attribs, attr)
+	// PERF: Hot path. Consolidate attribute strings into one buffer.
+	// !!!!!!!!!!!!!!!!!
+	// TODO: Cannot leave it like this !! This will cause strings to become invalid in case it ever needs to grow the buffer !!
+	// !!!!!!!!!!!!!!!!!
+	builder := strings.builder_make_len_cap(0, 500, doc.allocator)
+	defer {
+		append(&doc.strings_to_free, strings.to_string(builder))
 	}
+
+	for {
+		_meas_begin(m, .attributes_peek)
+		k := peek(t).kind
+		_meas_end(m, .attributes_peek)
+		if k != .Ident {
+			break
+		}
+
+		_meas_begin(m, .attributes_parse_attribute)
+		attr, offset := _parse_attribute(doc, &builder)       or_return
+		_meas_end(m, .attributes_parse_attribute)
+
+		_meas_begin(m, .attributes_check_duplicates)
+		check_duplicate_attributes(t, attribs^, attr, offset) or_return
+		_meas_end(m, .attributes_check_duplicates)
+
+		_meas_begin(m, .attributes_append)
+		append(attribs, attr)
+		_meas_end(m, .attributes_append)
+	}
+
+	//log.infof("Builder contents: %v", strings.to_string(builder))
+	//for attr in attribs {
+	//	log.infof("Attr: %v", attr.val)
+	//}
+
+	_meas_begin(m, .attributes_skip_whitespace)
 	skip_whitespace(t)
+	_meas_end(m, .attributes_skip_whitespace)
+
 	return .None
 }