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Misc performance tweaks (#4509)

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* use Array.Empty() where instead of allocating new zero-length arrays

* structure for loops in a way that the JIT will elide array/Span bounds checking

* avoiding function calls in for loop condition tests

* avoid LINQ in a hot path

* conform with code style

* fix mistake in GetNextWaitingObject()

* fix GetNextWaitingObject() possibility of returning null if all list items have TimePoint == long.MaxValue

* make GetNextWaitingObject() behave FIFO behavior for multiple items with the same TimePoint
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jhorv 2023-03-11 15:05:48 -05:00 • committed by GitHub
parent 81691b9e37
commit 23c844b2aa
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15 changed files with 48 additions and 31 deletions
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6
ARMeilleure/Decoders/OpCodeTable.cs
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@ -1301,7 +1301,7 @@ namespace ARMeilleure.Decoders
{
List<InstInfo>[] temp = new List<InstInfo>[FastLookupSize];
for (int index = 0; index < FastLookupSize; index++)
for (int index = 0; index < temp.Length; index++)
{
temp[index] = new List<InstInfo>();
}
@ -1311,7 +1311,7 @@ namespace ARMeilleure.Decoders
int mask = ToFastLookupIndex(inst.Mask);
int value = ToFastLookupIndex(inst.Value);
for (int index = 0; index < FastLookupSize; index++)
for (int index = 0; index < temp.Length; index++)
{
if ((index & mask) == value)
{
@ -1320,7 +1320,7 @@ namespace ARMeilleure.Decoders
}
}
for (int index = 0; index < FastLookupSize; index++)
for (int index = 0; index < temp.Length; index++)
{
table[index] = temp[index].ToArray();
}