refactor: use Encoding.Preamble to reduce array creation (#183)

only on .NET Core 2.1 or higher
nogic1008 · Jan 19, 2023 · b0cfcd5 · b0cfcd5
1 parent 95365d7
commit b0cfcd5
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/Nogic.WritableOptions/JsonWritableOptions.cs b/src/Nogic.WritableOptions/JsonWritableOptions.cs
@@ -100,7 +100,11 @@ public void Update(TOptions changedValue, bool reload = false)
                 ReadOnlySpan<byte> utf8Json = buffer.AsSpan();
 
                 // Check BOM
+#if NETCOREAPP2_1_OR_GREATER
+                var utf8bom = Encoding.UTF8.Preamble;
+#else
                 ReadOnlySpan<byte> utf8bom = Encoding.UTF8.GetPreamble();
+#endif
                 if (utf8Json.StartsWith(utf8bom))
                 {
 #pragma warning disable IDE0057