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authorJakov Smolić <jsmolic@gentoo.org>2022-08-22 09:57:17 +0200
committerJakov Smolić <jsmolic@gentoo.org>2022-08-22 10:03:23 +0200
commitc2f66264053f24ad3482f17306b8a142005986e1 (patch)
tree12f6218ca69265634d5cedfc7cf4952e67d73b7c /dev-haskell/bitwise/metadata.xml
parentdev-haskell/blaze-builder-conduit: treeclean (diff)
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dev-haskell/bitwise: treeclean
Signed-off-by: Jakov Smolić <jsmolic@gentoo.org>
Diffstat (limited to 'dev-haskell/bitwise/metadata.xml')
-rw-r--r--dev-haskell/bitwise/metadata.xml52
1 files changed, 0 insertions, 52 deletions
diff --git a/dev-haskell/bitwise/metadata.xml b/dev-haskell/bitwise/metadata.xml
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--- a/dev-haskell/bitwise/metadata.xml
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@@ -1,52 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
-<pkgmetadata>
- <maintainer type="project">
- <email>haskell@gentoo.org</email>
- <name>Gentoo Haskell</name>
- </maintainer>
- <longdescription>
- Unboxed multidimensional bit packed Bool arrays with fast aggregate
- operations based on lifting Bool operations to bitwise operations.
-
- There are many other bit packed structures out there, but none met
- all of these requirements:
-
- (1) unboxed bit packed Bool array,
-
- (2) multi-dimensional indexing,
-
- (3) fast (de)serialization, or interoperable with foreign code,
-
- (4) fast aggregate operations (fold, map, zip).
-
- Quick tour of the bitwise library:
-
- [Data.Bits.Bitwise] Lift boolean operations on 'Bool' to bitwise
- operations on 'Data.Bits.Bits'.
-
- [Data.Array.BitArray] Immutable bit arrays.
-
- [Data.Array.BitArray.ST] Mutable bit arrays in 'Control.Monad.ST.ST'.
-
- [Data.Array.BitArray.IO] Mutable bit arrays in 'IO'.
-
- [Data.Array.BitArray.ByteString] (De)serialization.
-
- [Codec.Image.PBM] Portable bitmap monochrome 2D image format.
-
- Very rough performance benchmarks:
-
- * immutable random access single bit reads:
- @BitArray ix@ is about 40% slower than @UArray ix Bool@,
-
- * 'Control.Monad.ST.ST' mutable random access single bit reads:
- @STBitArray s ix@ is about the same as @STUArray s ix Bool@,
-
- * immutable map @Bool -&gt; Bool@:
- @BitArray ix@ is about 85x faster than @UArray ix Bool@,
-
- * immutable zipWith @Bool -&gt; Bool -&gt; Bool@:
- @BitArray ix@ is about 1300x faster than @UArray ix Bool@.
- </longdescription>
-</pkgmetadata>