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Refactoring image cache

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use parallel linq to preload images, should be faster
This commit is contained in:
bao-qian
2016-04-21 23:37:40 +01:00
parent 80f31f75ad
commit 03051a95cf
7 changed files with 48 additions and 62 deletions
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32
Wox/ImageLoader/ImageCache.cs
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@@ -1,4 +1,5 @@
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using Wox.Infrastructure.Storage;
@@ -8,39 +9,26 @@ namespace Wox.ImageLoader
[Serializable]
public class ImageCache
{
private int counter;
private const int maxCached = 200;
public Dictionary<string, int> TopUsedImages = new Dictionary<string, int>();
private const int MaxCached = 200;
public ConcurrentDictionary<string, int> TopUsedImages = new ConcurrentDictionary<string, int>();
public void Add(string path)
{
if (TopUsedImages.ContainsKey(path))
{
TopUsedImages[path] = TopUsedImages[path] + 1 ;
TopUsedImages[path] = TopUsedImages[path] + 1;
}
else
{
TopUsedImages.Add(path, 1);
TopUsedImages[path] = 1;
}
if (TopUsedImages.Count > maxCached)
if (TopUsedImages.Count > MaxCached)
{
TopUsedImages = TopUsedImages.OrderByDescending(o => o.Value)
.Take(maxCached)
.ToDictionary(i => i.Key, i => i.Value);
}
if (++counter == 30)
{
counter = 0;
}
}
public void Remove(string path)
{
if (TopUsedImages.ContainsKey(path))
{
TopUsedImages.Remove(path);
var images = TopUsedImages.OrderByDescending(o => o.Value)
.Take(MaxCached)
.ToDictionary(i => i.Key, i => i.Value);
TopUsedImages = new ConcurrentDictionary<string, int>(images);
}
}
}