About package
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Mir-Random [1] is a random number generator library that covers
C++ STL [2]. It is compatible with mir.ndslice, std.algorithm,
and std.range. In the same time mir.random has its own API,
which is more secure and safe compared with std.random.
Release 0.3.0
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You may find the release notes with hyperlinks more useful:
https://github.com/libmir/mir-random/releases/tag/v0.3.0
Performance Increases
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We now use Daniel Lemire's fast alternative to modulo reduction.
Compiling with LDC 1.6.0 for x86-64, Mt19937_64 randIndex
throughput increased 40% for uint and 136% for ulong.
Xoroshiro128Plus randIndex throughput increased 73% for uint and
325% for ulong.
The required mir-algorithm version has increased to v0.7.0
because extMul is necessary for the ulong version.
New since v0.2.8
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- New engine: SplitMix64 / Splittable64
- Convenience functions related to thread-local randoms: rne
(like std.random rndGen); threadLocal!Engine for arbitrary
engine; & ways of mucking about with the bookkeeping state that
most people won't need but a few have requested in the past.
- Made some engines compatible with APIs that expect
std.random-style UniformRNG. Compatible as-is: Xoroshiro128Plus;
all predefined PCG engines; and the new SplitMix64/Splittable64
engines. For any others there is an adaptor. Copy-constructors
are disabled so they will only work with functions that "do the
right thing" and take PRNGs by reference and don't make implicit
copies of them.
Fixed since v0.2.8
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- Changed many parts of the library to be @safe.
- Linux GETRANDOM in unpredictableSeed now works on
non-x86/x86-64 architectures.
- Removed endian-dependency when producing 64-bit values from a
native-32-bit PRNG.
Changed APIs
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- The versions of genRandomBlocking/genRandomNonBlocking that
take a pointer and a length are no longer @trusted. Instead there
are trusted overloads for both that take a ubyte[].
- mir.random.algorithm has been changed in the interest of memory
safety. You can still write unsafe code but now if you try to
write @safe code the library will let you. Instead of taking
engines by reference and storing their addresses (which could
result in the stored address outliving the engine), now the
various functions require arguments to be either objects or
pointers to structs. For local-scoped engines there are templates
with alias parameters. This is a major API change so
feedback/criticism is welcome.
Links
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[1] https://github.com/libmir/mir-random
[2] http://en.cppreference.com/w/cpp/numeric/random