diff options
Diffstat (limited to 'system/doc/efficiency_guide/advanced.xml')
| -rw-r--r-- | system/doc/efficiency_guide/advanced.xml | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/system/doc/efficiency_guide/advanced.xml b/system/doc/efficiency_guide/advanced.xml index 016302fe50..e1760d0ded 100644 --- a/system/doc/efficiency_guide/advanced.xml +++ b/system/doc/efficiency_guide/advanced.xml @@ -87,15 +87,15 @@ </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> + <cell>5 words + the size of all keys and values.</cell> </row> <row> - <cell>Large Map</cell> + <cell>Large Map (> 32 keys)</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. + <c>N</c> x <c>F</c> words + the size of all keys and values.<br></br> + <c>N</c> is the number of keys in the Map.<br></br> + <c>F</c> is a sparsity factor that can vary between 1.6 and 1.8 + due to the probabilistic nature of the internal HAMT data structure. </cell> </row> <row> @@ -156,7 +156,7 @@ <seealso marker="erts:erl#max_processes"><c>+P</c></seealso> command-line flag in the <seealso marker="erts:erl"><c>erl(1)</c></seealso> - manual page in <c>erts</c>.</cell> + manual page in ERTS.</cell> </row> <row> <cell>Known nodes</cell> @@ -236,7 +236,7 @@ <seealso marker="erts:erl#max_ports"><c>+Q</c></seealso> command-line flag in the <seealso marker="erts:erl"><c>erl(1)</c></seealso> manual page - in <c>erts</c>.</cell> + in ERTS.</cell> </row> <row> <cell><marker id="files_sockets"></marker>Open files and |