[automerger skipped] Mark Android R (rvc-dev-plus-aosp-without-vendor@6692709) as merged am: cdb7a341d4 -s ours am: 570fb1d38e -s ours am: 43c2a7b282 -s ours am: bc8b870cd7 -s ours

am skip reason: Change-Id Ic91ee1134eb9cc96b09970635ad26da3e0246910 with SHA-1 010600680d is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/marisa-trie/+/12469816

Change-Id: I6e6dc73b3e688bb202b6a4270698d24261695afb
tree: 16eab9c4e23c14415431457f950126b0b0274663
  1. bindings/
  2. docs/
  3. include/
  4. lib/
  5. m4/
  6. tests/
  7. tools/
  8. vs2008/
  9. .gitignore
  10. Android.bp
  12. configure.ac
  13. COPYING.md
  14. Makefile.am
  15. marisa.pc.in
  18. README.md


Project name


Project summary

MARISA: Matching Algorithm with Recursively Implemented StorAge

Latest version



Matching Algorithm with Recursively Implemented StorAge (MARISA) is a static and space-efficient trie data structure. And libmarisa is a C++ library to provide an implementation of MARISA. Also, the package of libmarisa contains a set of command line tools for building and operating a MARISA-based dictionary.

A MARISA-based dictionary supports not only lookup but also reverse lookup, common prefix search and predictive search.

  • Lookup is to check whether or not a given string exists in a dictionary.
  • Reverse lookup is to restore a key from its ID.
  • Common prefix search is to find keys from prefixes of a given string.
  • Predictive search is to find keys starting with a given string.

The biggest advantage of libmarisa is that its dictionary size is considerably more compact than others. See below for the dictionary size of other implementations.

  • Input
    • Source: enwiki-20121101-all-titles-in-ns0.gz
    • Contents: all page titles of English Wikipedia (Nov. 2012)
    • Number of keys: 9,805,576
    • Total size: 200,435,403 bytes (plain) / 54,933,690 bytes (gzipped)
ImplementationSize (bytes)Remarks
darts-clone376,613,888Compacted double-array trie
tx-trie127,727,058LOUDS-based trie
marisa-trie50,753,560MARISA trie


Build instructions

You can get the latest version via git clone. Then, you can generate a configure script via autoreconf -i. After that, you can build and install libmarisa and its command line tools via configure and make. For details, see also documentation in docs.

$ git clone https://github.com/s-yata/marisa-trie.git
$ cd marisa-trie
$ autoreconf -i
$ ./configure --enable-native-code
$ make
$ make install

Source code license

  • The BSD 2-clause License
  • The LGPL 2.1 or any later version