kpathsea: Filename database

 
 5.5 Filename database ('ls-R')
 ==============================
 
 Kpathsea goes to some lengths to minimize disk accesses for searches
 (⇒Subdirectory expansion).  Nevertheless, in practice searching
 every possible directory in typical TeX installations takes an
 excessively long time.
 
    Therefore, Kpathsea can use an externally-built "filename database"
 file named 'ls-R' that maps files to directories, thus avoiding the need
 to exhaustively search the disk.
 
    A second database file 'aliases' allows you to give additional names
 to the files listed in 'ls-R'.
 
    The 'ls-R' and 'aliases' features are implemented in the source file
 'kpathsea/db.c'.
 

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