Use span.Min/Max helpers to speed up SearchValues.Create

src/libraries/System.Private.CoreLib/src/System/SearchValues/SearchValues.cs

@@ -242,21 +242,12 @@ public static SearchValues<string> Create(ReadOnlySpan<string> values, StringCom
         }
 
         private static bool TryGetSingleRange<T>(ReadOnlySpan<T> values, out T minInclusive, out T maxInclusive)
-            where T : struct, INumber<T>, IMinMaxValue<T>
+            where T : struct, INumber<T>
         {
-            T min = T.MaxValue;
-            T max = T.MinValue;
+            minInclusive = values.Min();
+            maxInclusive = values.Max();
 
-            foreach (T value in values)
-            {
-                min = T.Min(min, value);
-                max = T.Max(max, value);
-            }
-
-            minInclusive = min;
-            maxInclusive = max;
-
-            uint range = uint.CreateChecked(max - min) + 1;
+            uint range = uint.CreateChecked(maxInclusive - minInclusive) + 1;
             if (range > values.Length)
             {
                 return false;
@@ -268,7 +259,7 @@ private static bool TryGetSingleRange<T>(ReadOnlySpan<T> values, out T minInclus
 
             foreach (T value in values)
             {
-                int offset = int.CreateChecked(value - min);
+                int offset = int.CreateChecked(value - minInclusive);
                 seenValues[offset] = true;
             }
 

src/libraries/System.Text.RegularExpressions/src/System/Text/RegularExpressions/Symbolic/BDD.cs

@@ -307,14 +307,11 @@ public byte[] SerializeToBytes()
             // in other cases make use of the general serializer to long[]
             long[] serialized = Serialize();
 
+            // make sure this serialization is not applied to MTBDDs
+            Debug.Assert(serialized.AsSpan().Min() > 0);
+
             // get the maximal element from the array
-            long m = 0;
-            for (int i = 0; i < serialized.Length; i++)
-            {
-                // make sure this serialization is not applied to MTBDDs
-                Debug.Assert(serialized[i] > 0);
-                m = Math.Max(serialized[i], m);
-            }
+            long m = serialized.AsSpan().Max();
 
             // k is the number of bytes needed to represent the maximal element
             int k = m <= 0xFFFF ? 2 : (m <= 0xFF_FFFF ? 3 : (m <= 0xFFFF_FFFF ? 4 : (m <= 0xFF_FFFF_FFFF ? 5 : (m <= 0xFFFF_FFFF_FFFF ? 6 : (m <= 0xFF_FFFF_FFFF_FFFF ? 7 : 8)))));