50 check-ins occurring on or before 2014-12-26 15:50:38.
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2014-12-26
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| 15:50 | Initial implementation of package mtf - a move-to-front transform. check-in: ad5c25d9ab user: spaskalev tags: trunk | |
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2014-12-25
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| 08:48 | Allocate the predictor's decompression buffer per Read call. check-in: f06f8cd058 user: spaskalev tags: trunk | |
| 01:25 | Removed pdc's output buffer when decompressing as io.Copy uses a sufficiently-large buffer internally. check-in: 2b1ed8e45e user: spaskalev tags: trunk | |
| 00:55 | Predictor's compressor and decompressor structures now implement io.Writer/io.Reader in order to deal away with function indirection but they do not follow the required semantics. Those are provided by the SizedWriter/SizedReader wrappers returned by the constructor functions. check-in: 4dfcff962c user: spaskalev tags: trunk | |
| 00:43 | Extracted predictor's compressor and decompressor code into separate structs that embed Sized{Writer,Reader} check-in: 50507bd510 user: spaskalev tags: trunk | |
| 00:26 | Extracted SizedWriter to a sizedWriter struct with a Write() method. check-in: 46da7a6ae9 user: spaskalev tags: trunk | |
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2014-12-24
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| 23:58 | 0dev.org/ioutil/SizedReader is now as fast as bufio.Reader if not faster for a buffer of 4096 bytes. Switched pdc to use it for decompression buffering and removed profiling code from the former check-in: 2cec92909f user: spaskalev tags: trunk | |
| 23:45 | Extracted SizedReader to a sizedReader type with a Read() method. Closures seem to be slower in Go 1.4 and there is no real need for SizedReader to be a closure. check-in: b703c38e0b user: spaskalev tags: trunk | |
| 23:33 | Made SizedReader faster by keeping explicit buffer indices. check-in: 701ac713de user: spaskalev tags: trunk | |
| 22:32 | Use 0dev.org/ioutil.SizedWriter as an output buffer for pdc in both compress and decompress modes. check-in: 1717bfae3b user: spaskalev tags: trunk | |
| 21:40 | Fixed SizedWriter behavior so that it follows io.Writer's Write(...) contract. Added more tests for 100% CC on the ioutil package. Predictor's compressor now uses SizedWriter and no longer has to do any internal buffering. check-in: e1778aba98 user: spaskalev tags: trunk | |
| 19:07 | Implemented ioutil/SizedWriter. CC at 100%. check-in: c28a763d5e user: spaskalev tags: trunk | |
| 08:24 | Added an explicit copyright notice in the code. check-in: ffd1ab7b0c user: spaskalev tags: trunk | |
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2014-12-23
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| 20:53 | Renamed BlockReader to SizedReader, modified ioutil tests for 100% code coverage check-in: 11d1c50cd5 user: spaskalev tags: trunk | |
| 19:18 | Fixing ioutil tests to compile :) check-in: b0ff11dfcd user: spaskalev tags: trunk | |
| 18:52 | Renamed MinReader to BlockReader. The later is now used by predictor's decompressor to simplify the code and deal away with the need for internal buffering. check-in: 38f8e62c81 user: spaskalev tags: trunk | |
| 18:39 | Additional fixes and code simplification for MinReader check-in: 70896f73e9 user: spaskalev tags: trunk | |
| 14:27 | minReader fixes check-in: 4195e7817d user: spaskalev tags: trunk | |
| 10:38 | Added MinReader to ioutils, CC at 100% check-in: 47b221d5b4 user: spaskalev tags: trunk | |
| 09:32 | Removed the compressor alias type from predictor, use ioutil.WriterFunc check-in: c62581c2a6 user: spaskalev tags: trunk | |
| 08:15 | Removed the decompressor alias type from predictor, use ioutil.ReaderFunc check-in: 2b049247ed user: spaskalev tags: trunk | |
| 07:52 | Added package ioutil with io.Writer and io.Reader function wrappers check-in: 2bcd5307ea user: spaskalev tags: trunk | |
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2014-12-22
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| 19:52 | Added documentation for the decompressor check-in: 89bfe97384 user: spaskalev tags: trunk | |
| 19:28 | Extracted the predictor's hash function as a method of the context struct. Minor changes to the decompressor's variables. check-in: 9dfd3cb1a2 user: spaskalev tags: trunk | |
| 17:15 | Calculate the decompressed block length outside of the predictor loop check-in: 27ecac81d3 user: spaskalev tags: trunk | |
| 16:41 | Integrate the decompressor2 branch into trunk now that it is faster. check-in: 6d10a1d28f user: spaskalev tags: trunk | |
| 16:35 | Decompressor - try to fill as much as possible in the output buffer in a single pass. Closed-Leaf check-in: 42ba1f458d user: spaskalev tags: decompressor2 | |
| 15:34 | Fixed a nasty variable shadowing bug :) check-in: e9b80a705b user: spaskalev tags: decompressor2 | |
| 14:23 | Read available bytes and the end of the buffer and decompress in a singe pass check-in: ae0940d072 user: spaskalev tags: decompressor2 | |
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2014-12-21
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| 23:26 | Closing the decompressor2 branch as this implementation is slower than the naive one. check-in: 52e14c83da user: spaskalev tags: decompressor2 | |
| 23:24 | The decompressor now tries to fill in the whole output buffer in a single call. check-in: 1f73d90f65 user: spaskalev tags: trunk | |
| 22:52 | Removed TODOs, renamed readCount->rc, wrapped->reader check-in: 630530df49 user: spaskalev tags: trunk | |
| 22:12 | Check in the new decompressor implementation in a separate branch check-in: bd1368b81f user: spaskalev tags: decompressor2 | |
| 19:38 | Added debug/pprof to ease basic cpu profiling check-in: 1a4bdf36e2 user: spaskalev tags: trunk | |
| 17:23 | Fixed a rare case of losing data from the decompressor's internal result buffer. check-in: 7b74fd57f8 user: spaskalev tags: trunk | |
| 01:59 | Added a function that reverses the bits in a byte. Coverage: 100.0% of statements. check-in: 2be2ff6bf7 user: spaskalev tags: trunk | |
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2014-12-20
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| 17:44 | Buffer the input on decompressing, not the decompressor itself. This takes pdc -d < linux-3.18.1.tar.pdc > linux-3.18.1.tar down to 11 seconds from 13 minutes :) check-in: 4f0d26907d user: spaskalev tags: trunk | |
| 13:04 | Decompressor might loose part of the underlying buffer array by reslicing, fixed by copy check-in: d516e7425d user: spaskalev tags: trunk | |
| 11:52 | [predictor] Removed the buffer from the context struct, allocate the input slice buffer on creation with make. check-in: 723ffeb1fd user: spaskalev tags: trunk | |
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2014-12-19
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| 21:54 | Implemented commands/pdc using predictor. Made predictor's Compressor(...) return an io.Writer. check-in: c9f3a59cb6 user: spaskalev tags: trunk | |
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2014-12-16
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| 23:29 | Removed err variable from compressor check-in: 0f4bc650d1 user: spaskalev tags: trunk | |
| 22:56 | Reworked the compressor's buffering code, switched to table testing, add step testing for the compressor. Code coverage at 88.3% check-in: 1847f77062 user: spaskalev tags: trunk | |
| 16:04 | Removed goto from predictor's compressor, added more tests that invoke both compress/decompress check-in: 10013ae789 user: spaskalev tags: trunk | |
| 04:03 | Fixed issues with both compressor and decompressor, added more tests check-in: b838653282 user: spaskalev tags: trunk | |
| 01:55 | Added hamming weight lookup table for bytes in package bits. Added a PoC predictor decompressor implementation check-in: 60ca5b4b7b user: spaskalev tags: trunk | |
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2014-12-15
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| 21:22 | Added diff.D struct; Added an RFC1978 Predictor compressor implementation and a test check-in: 67794bdf14 user: spaskalev tags: trunk | |
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2014-12-14
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| 20:41 | Buffer stdout, use os.Args instead of flag check-in: 074a26f76b user: spaskalev tags: trunk | |
| 12:11 | Skip diagonals shorter than the current match check-in: e01b36769d user: spaskalev tags: trunk | |
| 01:03 | [bits] fixed package documentation [bits] added tests for the bool-backed vector [diff] added a real test, commented out the visual debug aids [plaindiff] added comments, removed commented code, added a helper []line getter [math] removed math package as it is currently unused check-in: d5adabf68e user: spaskalev tags: trunk | |
| 00:16 | Initial implementation of a diff program and required libraries check-in: be5950faa4 user: spaskalev tags: trunk | |