9437021d2f
Remove old file declaration
2018-06-04 13:32:41 -07:00
ddf143ba6a
Update usage_advanced
2018-06-04 10:16:05 -07:00
6a617d70ed
Documentation
2018-06-04 09:56:37 -07:00
65de25a463
Created Macros
2018-06-04 09:56:29 -07:00
2108decb41
Fixed a nasty corruption bug
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recently introduce into the new dictionary mode.
The bug could be reproduced with this command :
./zstreamtest -v --opaqueapi --no-big-tests -s4092 -t639
error was in function ZSTD_count_2segments() :
the beginning of the 2nd segment corresponds to prefixStart
and not the beginning of the current block (istart == src).
This would result in comparing the wrong byte.
2018-06-01 18:54:34 -07:00
5e586aa025
-O# with no file fails
2018-06-01 18:02:56 -07:00
e355f0a580
Added Level Option
2018-06-01 14:27:53 -07:00
d3615c28db
Merge pull request #1159 from GeorgeLu97/suffixlist
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Unknown Suffix Error
2018-06-01 14:00:10 -07:00
ae6d1fd3fa
Add Error Print
2018-06-01 13:54:08 -07:00
2b5b2ea7df
Merge pull request #1160 from GeorgeLu97/formatzstd
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Added --format=zstd
2018-06-01 12:46:03 -07:00
110ec9079d
Remove echo
2018-06-01 12:45:02 -07:00
c9b4d20f02
Added new --zstd= format
2018-06-01 12:39:39 -07:00
41249bf34b
Modified Tests
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Changed format as per suggestion and added second test
2018-06-01 10:54:51 -07:00
53ea32cabe
Suffix list test
2018-06-01 10:43:06 -07:00
143fc9ff6c
Merge pull request #1157 from facebook/decompressedSize
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minor : improved zstd.h API code comment
2018-06-01 10:28:17 -07:00
cfc3451dcc
Added Test Case
2018-06-01 09:52:25 -07:00
8984cc93d6
update display
2018-05-31 18:04:05 -07:00
547096d672
update man
2018-05-31 18:03:52 -07:00
c9b1068298
removed strcats
2018-05-31 17:47:29 -07:00
cec205c842
copy paste
2018-05-31 17:39:36 -07:00
7c33b48221
Merge pull request #1151 from felixhandte/zstd-dfast-in-place-dict-goto
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ZSTD_dfast: Support Searching the Dictionary Context In-Place (Alternate `goto` Implementation)
2018-05-31 17:37:09 -07:00
5ff30fe2e5
Unknown Suffix Error
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Changed so only compiled formats are printed in list of supported extensions
2018-05-31 16:13:36 -07:00
140f59d38e
Added --format=zstd
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title
2018-05-31 15:29:35 -07:00
48deab92de
Allow Different Dict Attachment Cut-Offs for Different Strategies
2018-05-31 17:37:44 -04:00
f86796639e
Remove Incorrect and Extraneous Repcode Bounds Check
2018-05-31 17:02:29 -04:00
9b979d0e33
minor : improved API code comment
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Extend guarantee that ZSTD_getFrameContentSize() will delivering the decompressed size
to any single-pass compression function.
Answer #1156
2018-05-31 11:12:18 -07:00
ac4f7ead3b
Merge pull request #1154 from facebook/altOpt
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minor optimal parser optimization
2018-05-30 13:05:51 -07:00
809f2f9322
minor update of literal cost function
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just assert() there is no negative cost evaluation for literals
2018-05-29 15:34:50 -07:00
463a0fe38b
simplified optimal parser
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removed "cached" structure.
prices are now saved in the optimal table.
Primarily done for simplification.
Might improve speed by a little.
But actually, and surprisingly, also improves ratio in some circumstances.
2018-05-29 14:07:25 -07:00
bb6eaf6495
Merge pull request #1153 from facebook/dynThreshold
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changed dynamic fse threshold for offset
2018-05-26 08:43:45 -07:00
e916c365a1
fixed minor visual warning
2018-05-25 20:43:09 -07:00
c6ccf435ae
Merge pull request #1152 from facebook/lowCompression
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btultra accepts blocks with poorer compression ratio
2018-05-25 17:46:11 -07:00
a7fdceeccd
changed dynamic fse threshold for offset
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recent experienced showed that
default distribution table for offset
can get it wrong pretty quickly with the nb of symbols,
while it remains a reasonable choice much longer for lengths symbols.
Changed the formula,
so that dynamic threshold is now 32 symbols for offsets.
It remains at 64 symbols for lengths.
Detection based on defaultNormLog
2018-05-25 17:41:16 -07:00
4b3a36d5d8
Merge branch 'dev' into lowCompression
2018-05-25 15:45:03 -07:00
744f36aac4
Merge pull request #1141 from facebook/staticDictCost
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Random stuff on High Compression mode
2018-05-25 15:43:32 -07:00
5f177f1c53
btultra accepts blocks with poorer compression ratio
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zstd rejects blocks which do not compress by at least a certain amount.
In which case, such block is simply emitted uncompressed (even if a little bit of compression could be achieved).
This is better for decompression speed, hence for energy.
The logic is controlled by ZSTD_minGain().
The rule is applied uniformly, at all compression levels.
This change makes btultra accepts blocks with poor compression ratios.
We presume that users of btultra mode prefers compression ratio over some decompress speed gains.
The threshold for minimum gain is lowered for btultra
from s>>6 (~1.5% minimum gain)
to s>>7 (~0.8% minimum gain).
This is a prudent change.
Not sure if it's large enough.
2018-05-25 15:19:52 -07:00
e2c0e3d437
slightly nudge choices towards less sequences
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also slightly improve some strange detrimental corner cases.
2018-05-25 14:52:21 -07:00
5b292b5685
Check Long + 1 Matches in Both Prefix and Dict in Bothe Short Match Paths
2018-05-25 13:13:57 -04:00
88b733b380
Interleave Prefix and Dict Searches
2018-05-25 13:13:57 -04:00
1850025156
Refactor ZSTD_dfast to Use `goto`s
2018-05-25 13:13:57 -04:00
43606f9c83
... When I Said "HashTable", I Meant "ChainTable"
2018-05-25 13:13:28 -04:00
ec7efe88f5
Fix Off-By-One Error
2018-05-25 13:13:28 -04:00
2bfe43267e
Disallow Too-Long Repcodes When Using an Attached Dict
2018-05-25 13:13:28 -04:00
b97ad3f457
Port Changes Made to ZSTD_fast to ZSTD_dfast
2018-05-25 13:13:28 -04:00
2313cca1b7
Implement Second Repcode Check
2018-05-25 13:13:28 -04:00
0998f10813
Implement First Repcode Check
2018-05-25 13:13:28 -04:00
50c5b2bb90
Find Dict Hash Table Matches
2018-05-25 13:13:28 -04:00
7a25f7ef5b
Existing Repcode Check Only Applies to noDict Case
2018-05-25 13:13:28 -04:00
8b241da4df
Properly Initialize Repcode Values
2018-05-25 13:13:28 -04:00
7097a03749
Add Necessary Dict Variables
2018-05-25 13:13:28 -04:00
George Lu
Yann Collet
Yann Collet
W. Felix Handte