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authorSverker Eriksson <[email protected]>2016-12-20 16:00:41 +0100
committerSverker Eriksson <[email protected]>2016-12-20 16:00:41 +0100
commit61632545f446689ade83d3e5d1c81d0e506708c8 (patch)
treef91dc94cc9fd21d89c68e88289b9fc239fc746fe /system/doc
parent241130879070712b75261efb635c07d642bdad37 (diff)
parentac2de409f9379544234f3356974feb2ac15d4818 (diff)
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Merge branch 'maint'
Diffstat (limited to 'system/doc')
-rw-r--r--system/doc/efficiency_guide/advanced.xml12
1 files changed, 6 insertions, 6 deletions
diff --git a/system/doc/efficiency_guide/advanced.xml b/system/doc/efficiency_guide/advanced.xml
index eee2648f34..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>