AuroraMiddleware/zstd
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Author SHA1 Message Date
Yann Collet
54f05641e3
Merge pull request #1161 from GeorgeLu97/paramgrillformat 
Added zstdcli-style format for compression parameters in paramgrill
 2018-06-04 14:56:23 -07:00
George Lu
3f054dceb4 forgot \n, ; 2018-06-04 13:38:37 -07:00
George Lu
ddf143ba6a Update usage_advanced 2018-06-04 10:16:05 -07:00
George Lu
5e586aa025 -O# with no file fails 2018-06-01 18:02:56 -07:00
George Lu
e355f0a580 Added Level Option 2018-06-01 14:27:53 -07:00
Yann Collet
d3615c28db
Merge pull request #1159 from GeorgeLu97/suffixlist 
Unknown Suffix Error
 2018-06-01 14:00:10 -07:00
George Lu
ae6d1fd3fa Add Error Print 2018-06-01 13:54:08 -07:00
Yann Collet
2b5b2ea7df
Merge pull request #1160 from GeorgeLu97/formatzstd 
Added --format=zstd
 2018-06-01 12:46:03 -07:00
George Lu
110ec9079d Remove echo 2018-06-01 12:45:02 -07:00
George Lu
c9b4d20f02 Added new --zstd= format 2018-06-01 12:39:39 -07:00
George Lu
41249bf34b Modified Tests 
Changed format as per suggestion and added second test
 2018-06-01 10:54:51 -07:00
George Lu
53ea32cabe Suffix list test 2018-06-01 10:43:06 -07:00
Yann Collet
143fc9ff6c
Merge pull request #1157 from facebook/decompressedSize 
minor : improved zstd.h API code comment
 2018-06-01 10:28:17 -07:00
George Lu
cfc3451dcc Added Test Case 2018-06-01 09:52:25 -07:00
George Lu
8984cc93d6 update display 2018-05-31 18:04:05 -07:00
George Lu
547096d672 update man 2018-05-31 18:03:52 -07:00
George Lu
c9b1068298 removed strcats 2018-05-31 17:47:29 -07:00
George Lu
cec205c842 copy paste 2018-05-31 17:39:36 -07:00
Yann Collet
7c33b48221
Merge pull request #1151 from felixhandte/zstd-dfast-in-place-dict-goto 
ZSTD_dfast: Support Searching the Dictionary Context In-Place (Alternate `goto` Implementation)
 2018-05-31 17:37:09 -07:00
George Lu
5ff30fe2e5 Unknown Suffix Error 
Changed so only compiled formats are printed in list of supported extensions
 2018-05-31 16:13:36 -07:00
George Lu
140f59d38e Added --format=zstd 
title
 2018-05-31 15:29:35 -07:00
W. Felix Handte
48deab92de Allow Different Dict Attachment Cut-Offs for Different Strategies 2018-05-31 17:37:44 -04:00
W. Felix Handte
f86796639e Remove Incorrect and Extraneous Repcode Bounds Check 2018-05-31 17:02:29 -04:00
Yann Collet
9b979d0e33 minor : improved API code comment 
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
Yann Collet
ac4f7ead3b
Merge pull request #1154 from facebook/altOpt 
minor optimal parser optimization
 2018-05-30 13:05:51 -07:00
Yann Collet
809f2f9322 minor update of literal cost function 
just assert() there is no negative cost evaluation for literals
 2018-05-29 15:34:50 -07:00
Yann Collet
463a0fe38b simplified optimal parser 
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
Yann Collet
bb6eaf6495
Merge pull request #1153 from facebook/dynThreshold 
changed dynamic fse threshold for offset
 2018-05-26 08:43:45 -07:00
Yann Collet
e916c365a1 fixed minor visual warning 2018-05-25 20:43:09 -07:00
Yann Collet
c6ccf435ae
Merge pull request #1152 from facebook/lowCompression 
btultra accepts blocks with poorer compression ratio
 2018-05-25 17:46:11 -07:00
Yann Collet
a7fdceeccd changed dynamic fse threshold for offset 
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
Yann Collet
4b3a36d5d8 Merge branch 'dev' into lowCompression 2018-05-25 15:45:03 -07:00
Yann Collet
744f36aac4
Merge pull request #1141 from facebook/staticDictCost 
Random stuff on High Compression mode
 2018-05-25 15:43:32 -07:00
Yann Collet
5f177f1c53 btultra accepts blocks with poorer compression ratio 
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
Yann Collet
e2c0e3d437 slightly nudge choices towards less sequences 
also slightly improve some strange detrimental corner cases.
 2018-05-25 14:52:21 -07:00
W. Felix Handte
5b292b5685 Check Long + 1 Matches in Both Prefix and Dict in Bothe Short Match Paths 2018-05-25 13:13:57 -04:00
W. Felix Handte
88b733b380 Interleave Prefix and Dict Searches 2018-05-25 13:13:57 -04:00
W. Felix Handte
1850025156 Refactor ZSTD_dfast to Use gotos 2018-05-25 13:13:57 -04:00
W. Felix Handte
43606f9c83 ... When I Said "HashTable", I Meant "ChainTable" 2018-05-25 13:13:28 -04:00
W. Felix Handte
ec7efe88f5 Fix Off-By-One Error 2018-05-25 13:13:28 -04:00
W. Felix Handte
2bfe43267e Disallow Too-Long Repcodes When Using an Attached Dict 2018-05-25 13:13:28 -04:00
W. Felix Handte
b97ad3f457 Port Changes Made to ZSTD_fast to ZSTD_dfast 2018-05-25 13:13:28 -04:00
W. Felix Handte
2313cca1b7 Implement Second Repcode Check 2018-05-25 13:13:28 -04:00
W. Felix Handte
0998f10813 Implement First Repcode Check 2018-05-25 13:13:28 -04:00
W. Felix Handte
50c5b2bb90 Find Dict Hash Table Matches 2018-05-25 13:13:28 -04:00
W. Felix Handte
7a25f7ef5b Existing Repcode Check Only Applies to noDict Case 2018-05-25 13:13:28 -04:00
W. Felix Handte
8b241da4df Properly Initialize Repcode Values 2018-05-25 13:13:28 -04:00
W. Felix Handte
7097a03749 Add Necessary Dict Variables 2018-05-25 13:13:28 -04:00
W. Felix Handte
aacbbf4f9a Rename 'lowest' to 'localLowest' to Prepare to Introduce Dict Indices 2018-05-25 13:13:28 -04:00
W. Felix Handte
c10d1b4011 Skeleton for In-Place Impl for ZSTD_dfast 2018-05-25 13:13:28 -04:00