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PureXML/Sources/Parsing
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Mihaela Mihaljevic 2b6da0d0a0 perf(parsing): reuse one scratch set for the attribute duplicate-name check 
Fourth profile-guided pass (#139, docs/benchmarks.md pass 28). scanAttributes
allocated a fresh Set<String>'s native storage on every element with
attributes, just to check a handful of names for duplicates; the set is now a
stored EventReader scratch property cleared with removeAll(keepingCapacity:)
per element, so each element's check reuses the previous element's storage.
Safe because scanAttributes cannot re-enter itself (nothing inside an
attribute scan starts another start-tag scan), so the shared storage never
sees two interleaved scans; duplicate detection, recovering-mode behavior,
and thrown errors are unchanged.

Verified in an isolated worktree at the previous commit: full local suite
(1858 tests) and full W3C XSTS suite (14383 groups) pass unchanged. Measured
with an interleaved same-state A/B, baseline/patched/baseline/patched each
best-of-5, because the machine carried concurrent load this session: both
patched runs (0.1073s, 0.1067s) beat both baseline runs (0.1091s, 0.1117s),
~2-4% on parse.

Recorded alongside, per the benchmarks log's discipline: a sibling candidate
(reserving each tree frame's children capacity on first append) measured
neutral under the same protocol and was reverted rather than landed, and the
TreeNode weak-parent side-table cost (~9% of parse, swift_weakAssign per
child plus a runtime side table per parent) is documented under Known
structure of the gap as needing a design decision, since parent's
nil-after-release semantics are documented public API. Touched lines carry
repo-standard swiftformat rewraps applied by a concurrent formatter run.
2026-07-12 12:56:12 +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): byte-path quote handling, lazy expanded-name check, byte-scan entity guard 2026-07-12 12:27:00 +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 feat(parsing): EUC-JP decoding with vendored JIS X 0212 index (#99) 2026-06-09 07:57:52 +02:00
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(parsing): reuse one scratch set for the attribute duplicate-name check 2026-07-12 12:56:12 +02:00
EventReaderAttributes.swift perf(parsing): reuse one scratch set for the attribute duplicate-name check 2026-07-12 12:56:12 +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 feat(parsing): Shift-JIS decoding with vendored JIS X 0208 index (#99) 2026-06-09 07:54:05 +02:00
JIS0208Table2.swift feat(parsing): Shift-JIS decoding with vendored JIS X 0208 index (#99) 2026-06-09 07:54:05 +02:00
JIS0208Table3.swift feat(parsing): Shift-JIS decoding with vendored JIS X 0208 index (#99) 2026-06-09 07:54:05 +02:00
JIS0212Table1.swift feat(parsing): EUC-JP decoding with vendored JIS X 0212 index (#99) 2026-06-09 07:57:52 +02:00
JIS0212Table2.swift feat(parsing): EUC-JP decoding with vendored JIS X 0212 index (#99) 2026-06-09 07:57:52 +02:00
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): byte-path quote handling, lazy expanded-name check, byte-scan entity guard 2026-07-12 12:27:00 +02:00
ParsedDocument.swift feat(parsing): surface the XML declaration (version, encoding, standalone) 2026-06-08 14:53:04 +02:00
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 feat(parsing): Shift-JIS decoding with vendored JIS X 0208 index (#99) 2026-06-09 07:54:05 +02:00
SingleByteEncodings.swift feat(parsing): Windows-1255/1256/1258, KOI8-U complete the single-byte set (#97) 2026-06-09 07:29:25 +02:00
SingleByteTables.swift feat(parsing): Windows-1255/1256/1258, KOI8-U complete the single-byte set (#97) 2026-06-09 07:29:25 +02:00
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 feat(parsing): xmlReader breadth: attribute navigation, namespaces, lang, position 2026-06-08 15:01:48 +02:00
UnparsedEntity.swift feat(dtd): conditional sections, notations, NDATA, external parameter entities 2026-06-08 14:39:42 +02:00
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