简介

PHP Judy is a PECL extension for the » Judy C library implementing dynamic sparse arrays.

A Judy array is a complex but very fast associative array data structure for storing and looking up values using integer or string keys. Unlike normal arrays, Judy arrays may be sparse; that is, they may have large ranges of unassigned indices.

A Judy array consumes memory only when populated yet can grow to take advantage of all available memory. Judy's key benefits are: scalability, performance, memory efficiency, and ease of use. Judy arrays are designed to grow without tuning into the peta-element range, scaling near O(log-base-256) -- 1 more RAM access at 256 X population.

php 其它基本扩展 judy arrays php judy the judy class php judy 函数 return the type of a judy array php judy 函数 return or print the current php judy version php judy 简介 php judy construct a new judy object php judy count the number of elements in the judy array php judy destruct a judy object php judy search for the first index in the judy array php judy search for the first absent index in the judy array php judy free the entire judy array php judy return the type of the current judy array php judy search for the last index in the judy array php judy offset to set php judy offset to unset php judy search for the previous index in the judy array php judy search for the previous absent index in the judy array php judy 安装／配置 php judy return the size of the current judy array php judy judy 函数