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ae370b0e12
commit
34aa401afd
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@ -541,7 +541,7 @@ typedef enum {
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* , for all strategies > fast, effective maximum is 6.
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* , for all strategies > fast, effective maximum is 6.
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* Special: value 0 means "use default minMatchLength". */
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* Special: value 0 means "use default minMatchLength". */
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ZSTD_c_targetLength=106, /* Impact of this field depends on strategy.
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ZSTD_c_targetLength=106, /* Impact of this field depends on strategy.
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* For strategies btopt & btultra:
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* For strategies btopt, btultra & btultra2:
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* Length of Match considered "good enough" to stop search.
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* Length of Match considered "good enough" to stop search.
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* Larger values make compression stronger, and slower.
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* Larger values make compression stronger, and slower.
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* For strategy fast:
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* For strategy fast:
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@ -1,5 +1,5 @@
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.
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.
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.TH "ZSTD" "1" "November 2018" "zstd 1.3.8" "User Commands"
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.TH "ZSTD" "1" "December 2018" "zstd 1.3.8" "User Commands"
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.
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.
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.SH "NAME"
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.SH "NAME"
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\fBzstd\fR \- zstd, zstdmt, unzstd, zstdcat \- Compress or decompress \.zst files
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\fBzstd\fR \- zstd, zstdmt, unzstd, zstdcat \- Compress or decompress \.zst files
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@ -316,7 +316,7 @@ set process priority to real\-time
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Specify a strategy used by a match finder\.
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Specify a strategy used by a match finder\.
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.
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.
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.IP
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.IP
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There are 8 strategies numbered from 1 to 8, from faster to stronger: 1=ZSTD_fast, 2=ZSTD_dfast, 3=ZSTD_greedy, 4=ZSTD_lazy, 5=ZSTD_lazy2, 6=ZSTD_btlazy2, 7=ZSTD_btopt, 8=ZSTD_btultra\.
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There are 9 strategies numbered from 1 to 9, from faster to stronger: 1=ZSTD_fast, 2=ZSTD_dfast, 3=ZSTD_greedy, 4=ZSTD_lazy, 5=ZSTD_lazy2, 6=ZSTD_btlazy2, 7=ZSTD_btopt, 8=ZSTD_btultra, 9=ZSTD_btultra2\.
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.
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.
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.TP
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.TP
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\fBwindowLog\fR=\fIwlog\fR, \fBwlog\fR=\fIwlog\fR
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\fBwindowLog\fR=\fIwlog\fR, \fBwlog\fR=\fIwlog\fR
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@ -373,7 +373,7 @@ The minimum \fImml\fR is 3 and the maximum is 7\.
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The impact of this field vary depending on selected strategy\.
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The impact of this field vary depending on selected strategy\.
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.
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.
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.IP
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.IP
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For ZSTD_btopt and ZSTD_btultra, it specifies the minimum match length that causes match finder to stop searching for better matches\. A larger \fBtargetLen\fR usually improves compression ratio but decreases compression speed\.
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For ZSTD_btopt, ZSTD_btultra and ZSTD_btultra2, it specifies the minimum match length that causes match finder to stop searching\. A larger \fBtargetLen\fR usually improves compression ratio but decreases compression speed\.
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.
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.
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.IP
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.IP
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For ZSTD_fast, it triggers ultra\-fast mode when > 0\. The value represents the amount of data skipped between match sampling\. Impact is reversed : a larger \fBtargetLen\fR increases compression speed but decreases compression ratio\.
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For ZSTD_fast, it triggers ultra\-fast mode when > 0\. The value represents the amount of data skipped between match sampling\. Impact is reversed : a larger \fBtargetLen\fR increases compression speed but decreases compression ratio\.
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@ -339,9 +339,10 @@ The list of available _options_:
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- `strategy`=_strat_, `strat`=_strat_:
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- `strategy`=_strat_, `strat`=_strat_:
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Specify a strategy used by a match finder.
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Specify a strategy used by a match finder.
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There are 8 strategies numbered from 1 to 8, from faster to stronger:
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There are 9 strategies numbered from 1 to 9, from faster to stronger:
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1=ZSTD\_fast, 2=ZSTD\_dfast, 3=ZSTD\_greedy, 4=ZSTD\_lazy,
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1=ZSTD\_fast, 2=ZSTD\_dfast, 3=ZSTD\_greedy,
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5=ZSTD\_lazy2, 6=ZSTD\_btlazy2, 7=ZSTD\_btopt, 8=ZSTD\_btultra.
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4=ZSTD\_lazy, 5=ZSTD\_lazy2, 6=ZSTD\_btlazy2,
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7=ZSTD\_btopt, 8=ZSTD\_btultra, 9=ZSTD\_btultra2.
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- `windowLog`=_wlog_, `wlog`=_wlog_:
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- `windowLog`=_wlog_, `wlog`=_wlog_:
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Specify the maximum number of bits for a match distance.
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Specify the maximum number of bits for a match distance.
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@ -394,8 +395,8 @@ The list of available _options_:
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- `targetLen`=_tlen_, `tlen`=_tlen_:
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- `targetLen`=_tlen_, `tlen`=_tlen_:
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The impact of this field vary depending on selected strategy.
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The impact of this field vary depending on selected strategy.
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For ZSTD\_btopt and ZSTD\_btultra, it specifies the minimum match length
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For ZSTD\_btopt, ZSTD\_btultra and ZSTD\_btultra2, it specifies
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that causes match finder to stop searching for better matches.
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the minimum match length that causes match finder to stop searching.
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A larger `targetLen` usually improves compression ratio
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A larger `targetLen` usually improves compression ratio
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but decreases compression speed.
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but decreases compression speed.
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@ -1,5 +1,5 @@
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.
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.
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.TH "ZSTDGREP" "1" "November 2018" "zstd 1.3.8" "User Commands"
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.TH "ZSTDGREP" "1" "December 2018" "zstd 1.3.8" "User Commands"
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.
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.
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.SH "NAME"
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.SH "NAME"
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\fBzstdgrep\fR \- print lines matching a pattern in zstandard\-compressed files
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\fBzstdgrep\fR \- print lines matching a pattern in zstandard\-compressed files
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@ -1,5 +1,5 @@
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.
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.
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.TH "ZSTDLESS" "1" "November 2018" "zstd 1.3.8" "User Commands"
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.TH "ZSTDLESS" "1" "December 2018" "zstd 1.3.8" "User Commands"
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.
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.
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.SH "NAME"
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.SH "NAME"
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\fBzstdless\fR \- view zstandard\-compressed files
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\fBzstdless\fR \- view zstandard\-compressed files
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