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| author | Björn-Egil Dahlberg <[email protected]> | 2015-05-07 17:23:23 +0200 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2016-05-20 15:33:18 +0200 |
| commit | 94aaadacf7daa6edf94724b1dee9549a60cc6498 (patch) | |
| tree | 76811b4e9367683e6295174570e4046c69d8923d /system/doc | |
| parent | 2098d573b097566d598ded1444625439ee6c0ae3 (diff) | |
| download | otp-94aaadacf7daa6edf94724b1dee9549a60cc6498.tar.gz otp-94aaadacf7daa6edf94724b1dee9549a60cc6498.tar.bz2 otp-94aaadacf7daa6edf94724b1dee9549a60cc6498.zip | |
doc: Update efficiency guide with Maps memory info
Diffstat (limited to 'system/doc')
| -rw-r--r-- | system/doc/efficiency_guide/advanced.xml | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/system/doc/efficiency_guide/advanced.xml b/system/doc/efficiency_guide/advanced.xml index 3609b8d88e..26e0c57e81 100644 --- a/system/doc/efficiency_guide/advanced.xml +++ b/system/doc/efficiency_guide/advanced.xml @@ -87,6 +87,19 @@ <cell>2 words + the size of each element.</cell> </row> <row> + <cell>Small Map</cell> + <cell>4 words + 2 words per entry (key and value) + the size of each key and value pair.</cell> + </row> + <row> + <cell>Large Map</cell> + <cell> + At least, 2 words + 2 x <c>N</c> words + 2 x log16(<c>N</c>) words + + the size of each key and value pair, where <c>N</c> is the number of pairs in the Map. + A large Map is represented as a tree internally where each node in the tree is a + "sparse tuple" of arity 16. + </cell> + </row> + <row> <cell>Pid</cell> <cell>1 word for a process identifier from the current local node + 5 words for a process identifier from another node.<br></br> |