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Merge pull request #206 from hans-olav/buffer_handling
Improving Buffer Handling to Reduce GC Pressure
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| using System; | ||
| using DokanNet.Logging; | ||
| using Microsoft.VisualStudio.TestTools.UnitTesting; | ||
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|
||
| namespace DokanNet.Tests | ||
| { | ||
| /// <summary> | ||
| /// Tests for <see cref="BufferPool"/>. | ||
| /// </summary> | ||
| [TestClass] | ||
| public sealed class BufferPoolTests | ||
| { | ||
| /// <summary> | ||
| /// Rudimentary test for <see cref="BufferPool"/>. | ||
| /// </summary> | ||
| [TestMethod, TestCategory(TestCategories.Success)] | ||
| public void BufferPoolBasicTest() | ||
| { | ||
| BufferPool pool = new BufferPool(); | ||
| ILogger logger = new ConsoleLogger(); | ||
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| // Verify buffer is pooled. | ||
| const int MB = 1024 * 1024; | ||
| byte[] buffer = pool.RentBuffer(MB, logger); | ||
| pool.ReturnBuffer(buffer, logger); | ||
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|
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| byte[] buffer2 = pool.RentBuffer(MB, logger); | ||
| Assert.AreSame(buffer, buffer2, "Expected recycling of 1 MB buffer."); | ||
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| // Verify buffer that buffer not power of 2 is not pooled. | ||
| buffer = pool.RentBuffer(MB - 1, logger); | ||
| pool.ReturnBuffer(buffer, logger); | ||
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| buffer2 = pool.RentBuffer(MB - 1, logger); | ||
| Assert.AreNotSame(buffer, buffer2, "Did not expect recycling of 1 MB - 1 byte buffer."); | ||
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| // Run through a bunch of random buffer sizes and make sure we always get a buffer of the right size. | ||
| int seed = Environment.TickCount; | ||
| Console.WriteLine($"Random seed: {seed}"); | ||
| Random random = new Random(seed); | ||
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| for (int i = 0; i < 1000; i++) | ||
| { | ||
| int size = random.Next(0, 2 * MB); | ||
| buffer = pool.RentBuffer((uint)size, logger); | ||
| Assert.AreEqual(size, buffer.Length, "Wrong buffer size."); | ||
| pool.ReturnBuffer(buffer, logger); | ||
| } | ||
| } | ||
| } | ||
| } |
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