concurrenthashmap

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TBB Concurrent Hash map

I am implementing tbb\'s concurrent hash map to compare the performance of it against a suite of other concurrent hash tables.[详细]

2023-04-05 15:59 分类：问答
Using a concurrent hashmap to reduce memory usage with threadpool?

I\'m working with a program that runs lengthy SQL queries and stores the processed results in a HashMap. Currently, to get around the slow execution time of each of the 20-200 queries, I am using a fi[详细]

2023-04-01 11:03 分类：问答
modifying a ConcurrentHashMap and Synchronized ArrayList in same method

I have a collection of objects that is modified by one thread and read by another (more specifically the EDT). I needed a solution that gave me fast look up and also fast indexing (by order inserted),[详细]

2023-03-23 08:42 分类：问答
Performance for HashMap when Key is Guaranteed Unique

If the keys I wish to use are guaranteed to be unique (or at least the assumption can be made that the keys are unique), does using a \'vanilla\' ConcurrentHashMap provide the best performance, or doe[详细]

2023-03-19 11:31 分类：问答
HashMap is broken/ performance issues

Currently I have Has开发者_如何转开发hMap implemented which private static Map<String, Item> cached = new HashMap<String, Item>();[详细]

2023-03-18 05:32 分类：问答
Does the static ConcurrentHashmap needs external synchronisation

Does the static ConcurrentHashmap need开发者_Python百科 to be externaly synchronized using synchronize block or locks?Yes and no. It depends on what you\'re doing. ConcurrentHashMap is thread safe for[详细]

2023-03-18 03:40 分类：问答
Can concurrntHashMap guarantee true thread safety and concurrency at the same time?

We know that ConcurrentHashMap can provide concurrent access to multiple threads to boost performance , and inside this class, segments are synchronized up (am I right?). Question is, can this design[详细]

2023-03-13 12:39 分类：问答
Using putIfAbsent like a short circuit operator

Is it possible to use putIfAbsent or any of its equivalents like a short circuit operator. myConcurrentMap.putIfAbsent(key,calculatedValue)[详细]

2023-03-11 06:50 分类：问答
Laziness of eviction in Guava's maps

Current eviction algorithm for maps is quite lazy. It looks like expired objects are evicted only when the data structure is accessed.[详细]

2023-03-02 21:17 分类：问答
Thread-safe map with null-key capability

I need a multi-threaded Map object to use in my web server\'s caching, and I need to have null keys. HashMap allows me to have null keys, but ConcurrentHashMap doesn\'t. I tried to create a synchroni[详细]

2023-02-26 19:35 分类：问答