github_mirrors/vectorscan
3
0
Fork 1
mirror of https://github.com/VectorCamp/vectorscan.git synced 2025-06-28 16:41:01 +03:00
Code Issues Packages Projects Releases Wiki Activity

changelog: updates for 4.3 release

Browse Source
This commit is contained in:
Justin Viiret 2016-08-24 14:21:57 +10:00 committed by Matthew Barr
parent 34d6a0d683
commit 896618fda1
1 changed files with 30 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
CHANGELOG.md
View File

@ -2,6 +2,36 @@
This is a list of notable changes to Hyperscan, in reverse chronological order.
## [4.3.0] 2016-08-24
- Introduce a new analysis pass ("Violet") used for decomposition of patterns
into literals and smaller engines.
- Introduce a new container engine ("Tamarama") for infix and suffix engines
that can be proven to run exclusively of one another. This reduces stream
state for pattern sets with many such engines.
- Introduce a new shuffle-based DFA engine ("Sheng"). This improves scanning
performance for pattern sets where small engines are generated.
- Improve the analysis used to extract extra mask information from short
literals.
- Reduced compile time spent in equivalence class analysis.
- Build: frame pointers are now only omitted for 32-bit release builds.
- Build: Workaround for C++ issues reported on FreeBSD/libc++ platforms.
(github issue #27)
- Simplify the LimEx NFA with a unified "variable shift" model, which reduces
the number of different NFA code paths to one per model size.
- Allow some anchored prefixes that may squash the literal to which they are
attached to run eagerly. This improves scanning performance for some
patterns.
- Simplify and improve EOD ("end of data") matching, using the interpreter for
all operations.
- Elide unnecessary instructions in the Rose interpreter at compile time.
- Reduce the number of inlined instantiations of the Rose interpreter in order
to reduce instruction cache pressure.
- Small improvements to literal matcher acceleration.
- Parser: ignore `\E` metacharacters that are not preceded by `\Q`. This
conforms to PCRE's behaviour, rather than returning a compile error.
- Check for misaligned memory when allocating an error structure in Hyperscan's
compile path and return an appropriate error if detected.
## [4.2.0] 2016-05-31
- Introduce an interpreter for many complex actions to replace the use of
internal reports within the core of Hyperscan (the "Rose" engine). This