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Re: speeding up hash_search?
From: |
Chet Ramey |
Subject: |
Re: speeding up hash_search? |
Date: |
Sun, 19 Apr 2020 15:46:26 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 |
On 4/19/20 10:53 AM, George Jones wrote:
> It looks like hash_search just does a linear walk if array entries to find
> elements in a list. This slows down (order N?) new inserts when the
> number of entries gets large.
Well, that's the collision handling mechanism. You have to have one. If the
hash table is sized right -- and it's entirely possible that the default
size of the hash table for associative arrays is too small for your use
case -- it's not much overhead.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
- speeding up hash_search?, George Jones, 2020/04/19
- Re: speeding up hash_search?,
Chet Ramey <=
- [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), Koichi Murase, 2020/04/19
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), George Jones, 2020/04/19
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), Koichi Murase, 2020/04/20
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), Koichi Murase, 2020/04/20
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), Greg Wooledge, 2020/04/20
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), Chet Ramey, 2020/04/20
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), Koichi Murase, 2020/04/20
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), George Jones, 2020/04/20
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), Chet Ramey, 2020/04/20
- Re: [PATCH] Implement rehashing for associative arrays (Re: speeding up hash_search?), George Jones, 2020/04/20