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[csharp] SkeletonBinary: Optimization of ReadFloat and ReadInt performance, overall ~10% performance gain. Closes #1698.

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This commit is contained in:
Harald Csaszar 2020-06-12 11:35:13 +02:00
parent eadce3188c
commit a7e2c9d52a
1 changed files with 11 additions and 5 deletions
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16
spine-csharp/src/SkeletonBinary.cs
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@ -883,6 +883,7 @@ namespace Spine {
internal class SkeletonInput { internal class SkeletonInput {
private byte[] chars = new byte[32]; private byte[] chars = new byte[32];
private byte[] bytesBigEndian = new byte[4];
internal ExposedList<String> strings; internal ExposedList<String> strings;
Stream input; Stream input;
@ -905,15 +906,20 @@ namespace Spine {
} }
public float ReadFloat () { public float ReadFloat () {
chars[3] = (byte)input.ReadByte(); input.Read(bytesBigEndian, 0, 4);
chars[2] = (byte)input.ReadByte(); chars[3] = bytesBigEndian[0];
chars[1] = (byte)input.ReadByte(); chars[2] = bytesBigEndian[1];
chars[0] = (byte)input.ReadByte(); chars[1] = bytesBigEndian[2];
chars[0] = bytesBigEndian[3];
return BitConverter.ToSingle(chars, 0); return BitConverter.ToSingle(chars, 0);
} }
public int ReadInt () { public int ReadInt () {
return (input.ReadByte() << 24) + (input.ReadByte() << 16) + (input.ReadByte() << 8) + input.ReadByte(); input.Read(bytesBigEndian, 0, 4);
return (bytesBigEndian[0] << 24)
+ (bytesBigEndian[1] << 16)
+ (bytesBigEndian[2] << 8)
+ bytesBigEndian[3];
} }
public int ReadInt (bool optimizePositive) { public int ReadInt (bool optimizePositive) {