From 8b0e285f09439946ddbc18af21fae414e058513f Mon Sep 17 00:00:00 2001 From: Justin Viiret Date: Wed, 4 May 2016 17:36:46 +1000 Subject: [PATCH] changelog: updates for 4.2 release --- CHANGELOG.md | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/CHANGELOG.md b/CHANGELOG.md index c137017a..19a37b8e 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,40 @@ This is a list of notable changes to Hyperscan, in reverse chronological order. +## [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 + improves scanning performance and reduces database size for many pattern + sets. +- Many enhancements to the acceleration framework used by NFA and DFA engines, + including more flexible multibyte implementations and more AVX2 support. This + improves scanning performance for many pattern sets. +- Improved prefiltering support for complex patterns containing very large + bounded repeats (`R{M,N}` with large `N`). +- Improve scanning performance of pattern sets with a very large number of + EOD-anchored patterns. +- Improve scanning performance of large pattern sets that use the + `HS_FLAG_SINGLEMATCH` flag. +- Improve scanning performance of pattern sets that contain a single literal by + improving the "Noodle" literal matcher. +- Small reductions in total stream state for many pattern sets. +- Improve runtime detection of AVX2 support. +- Disable -Werror for release builds, in order to behave better for packagers + and users with different compiler combinations than those that we test. +- Improve support for building on Windows with MSVC 2015 (github issue #14). + Support for Hyperscan on Windows is still experimental. +- Small updates to fix warnings identified by Coverity. +- Remove Python codegen for the "FDR" and "Teddy" literal matchers. These are + now implemented directly in C code. +- Remove the specialist "Sidecar" engine in favour of using our more general + repeat engines. +- New API function: add the `hs_expression_ext_info()` function. This is a + variant of `hs_expression_info()` that can accept patterns with extended + parameters. +- New API error value: add the `HS_SCRATCH_IN_USE` error, which is returned + when Hyperscan detects that a scratch region is already in use on entry to an + API function. + ## [4.1.0] 2015-12-18 - Update version of PCRE used by testing tools as a syntax and semantic reference to PCRE 8.38.