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Performance tweak

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The Visual Studio performance profiler showed the FormatDescriptor
equality test being called quite a lot.  The test was vs. null, so
a simple change from "==" to "is" improved performance dramatically.

Fixing the underlying issue with a better data structure is still
important, but this provided a big boost with little effort.
This commit is contained in:
Andy McFadden 2020-07-07 12:09:00 -07:00
parent f4fe3af050
commit 44522dc2f2
1 changed files with 2 additions and 2 deletions
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4
SourceGen/DataAnalysis.cs
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@ -360,7 +360,7 @@ namespace SourceGen {
// If the target offset has a symbol assigned, use it. Otherwise, try to // If the target offset has a symbol assigned, use it. Otherwise, try to
// find something nearby that might be more appropriate. // find something nearby that might be more appropriate.
int origTargetOffset = targetOffset; int origTargetOffset = targetOffset;
if (mAnattribs[targetOffset].Symbol == null) { if (mAnattribs[targetOffset].Symbol is null) {
if (mAnalysisParams.SeekNearbyTargets) { if (mAnalysisParams.SeekNearbyTargets) {
targetOffset = FindAlternateTarget(srcOffset, targetOffset); targetOffset = FindAlternateTarget(srcOffset, targetOffset);
} }
@ -392,7 +392,7 @@ namespace SourceGen {
int scanOffset = targetOffset; int scanOffset = targetOffset;
while (--scanOffset >= 0) { while (--scanOffset >= 0) {
FormatDescriptor dfd = mAnattribs[scanOffset].DataDescriptor; FormatDescriptor dfd = mAnattribs[scanOffset].DataDescriptor;
if (dfd != null) { if (!(dfd is null)) {
if (scanOffset + dfd.Length > targetOffset) { if (scanOffset + dfd.Length > targetOffset) {
// Found a descriptor that encompasses target offset. Adjust // Found a descriptor that encompasses target offset. Adjust
// target to point at the start of the region. // target to point at the start of the region.