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.TH mg_fast_comp_dict 1 \*(Dt CITRI
.SH NAME
mg_fast_comp_dict \- build a fast loading compression dictionary
.SH SYNOPSIS
.B mg_fast_comp_dict
[
.B \-h
]
[
.BI \-d " directory"
]
.BI \-f " name"
.SH DESCRIPTION
.B mg_fast_comp_dict
builds a fast-loading compression dictionary from the standard
compression dictionary.  The new dictionary has the property that
.BR mgquery (1)
can load it in very quickly, making the startup time for
.BR mgquery (1)
much shorter.  The new dictionary is larger on disk than the original,
but they are no different when it comes to memory usage.
.SH OPTIONS
Options may appear in any order.
.TP "\w'\fB\-d\fP \fIdirectory\fP'u+2n"
.B \-h
This displays a usage line on
.IR stderr .
.TP
.BI \-d " directory"
This specifies the directory where the document collection can be found.
.TP
.BI \-f " name"
This specifies the base name of the document collection.
.SH ENVIRONMENT
.TP "\w'\fBMGDATA\fP'u+2n"
.SB MGDATA
If this environment variable exists, then its value is used as the
default directory where the mg
collection files are.  If this variable does not exist, then the
directory \*(lq\fB.\fP\*(rq is used by default.  The command line
option
.BI \-d " directory"
overrides the directory in
.BR MGDATA .
.SH FILES
.TP 20
.B *.text.dict
Compression dictionary.
.TP
.B *.text.dict.fast
Fast loading compression dictionary.
.TP
.B *.text.dict.aux
Auxiliary compression dictionary.
.SH "SEE ALSO"
.na
.BR mg_compression_dict (1),
.BR mg_invf_dict (1),
.BR mg_passes (1),
.BR mg_perf_hash_build (1),
.BR mg_stem_idx (1),
.BR mg_weights_build (1)