[4.4.0] 2017-01-20
- Introduce the "fat runtime" build. This will build several variants of the
Hyperscan scanning engine specialised for different processor feature sets,
and use the appropriate one for the host at runtime. This uses the "ifunc"
indirect function attribute provided by GCC and is currently available on
Linux only, where it is the default for release builds. - New API function: add the
hs_valid_platform()function. This function tests
whether the host provides the SSSE3 instruction set required by Hyperscan. - Introduce a new standard benchmarking tool, "hsbench". This provides an easy
way to measure Hyperscan's performance for a particular set of patterns and
corpus of data to be scanned. - Introduce a 64-bit GPR LimEx NFA model, which uses 64-bit GPRs on 64-bit
hosts and SSE registers on 32-bit hosts. - Introduce a new DFA model ("McSheng") which is a hybrid of the existing
McClellan and Sheng models. This improves scanning performance for some
cases. - Introduce lookaround specialisations to improve scanning performance.
- Improve the handling of long literals by moving confirmation to the Rose
interpreter and simplifying the hash table used to track them in streaming
mode. - Improve compile time optimisation for removing redundant paths from
expression graphs. - Build: improve support for building with MSVC toolchain.
- Reduce the size of small write DFAs used for small scans in block mode.
- Introduce a custom graph type (
ue2_graph) used in place of the Boost Graph
Library'sadjacency_listtype. Improves compile time performance and type
safety. - Improve scanning performance of the McClellan DFA.
- Bugfix for a very unusual SOM case where the incorrect start offset was
reported for a match. - Bugfix for issue #37, removing execute permissions from some source files.
- Bugfix for issue #41, handle Windows line endings in pattern files.