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7ffd1dd545
PureXML/Sources/Parsing
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Mihaela Mihaljevic 7ffd1dd545 perf(parsing): remove redundant work in attribute-value and namespace scanning 
Two profile-guided passes (#139), found by sample-profiling a 42MB generated
corpus after re-measuring the parse/libxml2 ratio fresh:

scanAttributeValue's closing-quote check re-derived an already-known answer
through Reader.consume's general String-iteration path, which allocates a
fresh String(quote) and iterates it via Character machinery twice, on every
single attribute value in the document. The content loop's own break
condition already guarantees the buffered peek is either the quote or end of
input, so checking it directly and advancing once is the same behavior for
less work.

NamespaceContext.enterElement, called once per element: checkNameShape's
name.localName.contains(":") resolved to Sequence.contains(_:), walking
extended grapheme clusters to find one ASCII byte; utf8.contains(0x3A) finds
the same colon via the UTF-8 byte view. Separately, attributes.map{
resolveAttribute } allocated a fresh backing array on every element even
though resolveAttribute returns its argument unchanged whenever the attribute
has no prefix or the xmlns prefix (the common case); checking first with no
allocation and reusing the input array when nothing would change gives the
identical result without it.

Both are same-observable-behavior changes, verified against the full local
suite (1852 tests) and the full W3C XSTS conformance suite (14383 groups),
both unchanged. Measured parse ~6.59x -> ~6.00x versus libxml2 at the
20000-item/4.2MB corpus, best of 5; see docs/benchmarks.md passes 25-26.
2026-07-12 11:40:33 +02:00
..
Big5Decoder.swift feat(parsing): Big5 (Traditional Chinese / HKSCS) 2026-06-09 08:30:57 +02:00
Big5Table1.swift feat(parsing): Big5 (Traditional Chinese / HKSCS) 2026-06-09 08:30:57 +02:00
Big5Table2.swift feat(parsing): Big5 (Traditional Chinese / HKSCS) 2026-06-09 08:30:57 +02:00
Big5Table3.swift feat(parsing): Big5 (Traditional Chinese / HKSCS) 2026-06-09 08:30:57 +02:00
Big5Table4.swift feat(parsing): Big5 (Traditional Chinese / HKSCS) 2026-06-09 08:30:57 +02:00
Big5Table5.swift feat(parsing): Big5 (Traditional Chinese / HKSCS) 2026-06-09 08:30:57 +02:00
Big5Table6.swift feat(parsing): Big5 (Traditional Chinese / HKSCS) 2026-06-09 08:30:57 +02:00
Big5Table.swift feat(parsing): Big5 (Traditional Chinese / HKSCS) 2026-06-09 08:30:57 +02:00
ByteDecoder.swift feat(parsing): fatal encoding-declaration contradictions, E38 version rule 2026-06-10 08:16:08 +02:00
ByteEncoder.swift feat(emitting): CJK output encodings, closing output-encoding parity 2026-06-09 09:41:28 +02:00
ByteStorage.swift perf(parsing): byte-backed Reader and bulk content runs 2026-06-10 18:48:57 +02:00
CharacterClassification.swift perf(parsing): byte-level scanning fast paths halve parse time vs libxml2 (#275) 2026-06-24 18:46:58 +02:00
CJKByteEncoder.swift feat(emitting): CJK output encodings, closing output-encoding parity 2026-06-09 09:41:28 +02:00
Diagnostic.swift feat(parsing): Namespaces 1.0 constraint enforcement 2026-06-10 08:06:45 +02:00
DoctypeScanner.swift refactor: remove three dead file-scoped functions (#330) 2026-06-26 12:04:07 +02:00
DoctypeScannerConditional.swift refactor(validation): located structured validity findings 2026-06-10 10:45:17 +02:00
DoctypeScannerEntities.swift refactor(validation): located structured validity findings 2026-06-10 10:45:17 +02:00
DoctypeScannerStrict.swift refactor(validation): located structured validity findings 2026-06-10 10:45:17 +02:00
DocumentType.swift refactor(validation): located structured validity findings 2026-06-10 10:45:17 +02:00
DTDAttListGrammar.swift feat(parsing): scalar-level lexing, xmlconf archive fully conformant 2026-06-10 08:40:26 +02:00
DTDContentModelGrammar.swift feat(parsing): scalar-level lexing, xmlconf archive fully conformant 2026-06-10 08:40:26 +02:00
EntityDecoder.swift perf(parsing): linearize entity-graph checks for billion-laughs (#342) 2026-06-26 15:30:51 +02:00
EntityReplacementGrammar.swift feat(parsing): scalar-level lexing, xmlconf archive fully conformant 2026-06-10 08:40:26 +02:00
EntityResolver.swift
EUCJPDecoder.swift
EUCKRDecoder.swift feat(parsing): EUC-KR (CP949) decoding with vendored index (#99) 2026-06-09 08:02:14 +02:00
EUCKRTable1.swift feat(parsing): EUC-KR (CP949) decoding with vendored index (#99) 2026-06-09 08:02:14 +02:00
EUCKRTable2.swift feat(parsing): EUC-KR (CP949) decoding with vendored index (#99) 2026-06-09 08:02:14 +02:00
EUCKRTable3.swift feat(parsing): EUC-KR (CP949) decoding with vendored index (#99) 2026-06-09 08:02:14 +02:00
EUCKRTable4.swift feat(parsing): EUC-KR (CP949) decoding with vendored index (#99) 2026-06-09 08:02:14 +02:00
EUCKRTable5.swift feat(parsing): EUC-KR (CP949) decoding with vendored index (#99) 2026-06-09 08:02:14 +02:00
EUCKRTable6.swift feat(parsing): EUC-KR (CP949) decoding with vendored index (#99) 2026-06-09 08:02:14 +02:00
EUCTWDecoder.swift refactor(parsing): drop slice copies; document the expansion bounds 2026-06-10 04:01:16 +02:00
EUCTWPlane11.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
EUCTWPlane12.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
EUCTWPlane13.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
EUCTWPlane21.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
EUCTWPlane22.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
EUCTWPlane23.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
EUCTWTable.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
Event.swift
EventReader.swift perf(parse): split the name prefix from a scanned colon offset (#292) 2026-06-25 12:23:53 +02:00
EventReaderAttributes.swift perf(parsing): remove redundant work in attribute-value and namespace scanning 2026-07-12 11:40:33 +02:00
EventReaderContent.swift perf(parsing): dispatch element-content markup on the byte after '<' (#276) 2026-06-24 19:25:10 +02:00
EventReaderEndTag.swift feat(xpath,parsing): public streaming surface, linear document-order at scale 2026-06-11 06:06:31 +02:00
EventReaderRecovery.swift feat(parsing): fourth W3C-suite strictness pass, declaration grammar 2026-06-10 05:34:11 +02:00
EventReaderValidity.swift perf(parse): bulk-copy literal runs in the entity decoder (#291) 2026-06-25 11:45:02 +02:00
ExternalID.swift feat(parsing): per-entity base-URI tracking for nested external entities 2026-06-10 08:24:17 +02:00
GB18030Decoder.swift refactor(parsing): drop slice copies; document the expansion bounds 2026-06-10 04:01:16 +02:00
GB18030Ranges.swift feat(parsing): full GB18030 four-byte sequences 2026-06-09 08:24:00 +02:00
GBKDecoder.swift feat(parsing): GBK/GB2312 decoding completes the CJK encodings (#99) 2026-06-09 08:08:52 +02:00
GBKTable1.swift feat(parsing): GBK/GB2312 decoding completes the CJK encodings (#99) 2026-06-09 08:08:52 +02:00
GBKTable2.swift feat(parsing): GBK/GB2312 decoding completes the CJK encodings (#99) 2026-06-09 08:08:52 +02:00
GBKTable3.swift feat(parsing): GBK/GB2312 decoding completes the CJK encodings (#99) 2026-06-09 08:08:52 +02:00
GBKTable4.swift feat(parsing): GBK/GB2312 decoding completes the CJK encodings (#99) 2026-06-09 08:08:52 +02:00
GBKTable5.swift feat(parsing): GBK/GB2312 decoding completes the CJK encodings (#99) 2026-06-09 08:08:52 +02:00
GBKTable6.swift feat(parsing): GBK/GB2312 decoding completes the CJK encodings (#99) 2026-06-09 08:08:52 +02:00
InputEncoding.swift docs: align stale figures with code and the enforced XSTS gate 2026-06-19 23:32:04 +02:00
ISO2022JPDecoder.swift refactor(parsing): drop slice copies; document the expansion bounds 2026-06-10 04:01:16 +02:00
JIS0208Table1.swift
JIS0208Table2.swift
JIS0208Table3.swift
JIS0212Table1.swift
JIS0212Table2.swift
Limits.swift feat(parsing): strict internal-subset profile, xmltest 185 of 186 2026-06-10 08:29:54 +02:00
Mark.swift
NamespaceContext.swift perf(parsing): remove redundant work in attribute-value and namespace scanning 2026-07-12 11:40:33 +02:00
ParsedDocument.swift
ParseError.swift feat(parsing): Namespaces 1.0 constraint enforcement 2026-06-10 08:06:45 +02:00
Parser.swift feat(parsing): IBM section clean, entity-declared WFC/VC split, declaration recursion 2026-06-10 07:26:50 +02:00
ParserTreeBuild.swift perf(parse): build the TreeNode tree directly from the event stream (#295) 2026-06-25 14:15:57 +02:00
PseudoAttributeScanner.swift feat(parsing): fourth W3C-suite strictness pass, declaration grammar 2026-06-10 05:34:11 +02:00
PushAsync.swift
PushParser.swift
PushScanner.swift
Reader.swift perf(parsing): make entity/content expansion linear, not quadratic (#338) 2026-06-26 13:55:29 +02:00
ReaderByteRuns.swift perf(parsing): skip reference decoding for ampersand-free attribute values (#278) 2026-06-25 00:17:31 +02:00
ReadResult.swift
SAXHandler.swift
ShiftJISDecoder.swift
SingleByteEncodings.swift
SingleByteTables.swift
SourceRange.swift
StreamingDecoder.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
StreamingDecoderEUCTW.swift feat(parsing): EUC-TW (CNS 11643) decoding, closing #108 2026-06-09 17:44:22 +02:00
StreamingDecoderISO2022JP.swift feat(parsing): streaming honors the declared encoding; streaming ISO-2022-JP 2026-06-09 17:33:52 +02:00
TextReader.swift
UnparsedEntity.swift
ValidityFinding.swift refactor(validation): located structured validity findings 2026-06-10 10:45:17 +02:00
XMLCharacter.swift perf(parsing): byte-level scanning fast paths halve parse time vs libxml2 (#275) 2026-06-24 18:46:58 +02:00
XMLDeclaration.swift feat(parsing): strict DTD subset grammar, oasis section of xmlconf fully clean 2026-06-10 06:29:13 +02:00