Update README.md

Author: SoftStoneDevelop

README.md

@@ -11,7 +11,7 @@
 
 </h3>
 
-Collect the resulting string without allocating memory.
+Assembling a string with a pre-known resulting string length:  uses 50% less memory then StringBuilder.
 
 ## Benchmark:
 
@@ -51,4 +51,4 @@ Collect the resulting string without allocating memory.
 | Class.StringCreator |    500000 | 3,534,275.66 ns |  0.95 | 1000141 B |        0.50 |
 |                     |           |                 |       |           |             |
 |       **StringBuilder** |   **1071741** | **7,858,668.65 ns** |  **1.00** | **4287176 B** |        **1.00** |
-| Class.StringCreator |   1071741 | 7,359,583.80 ns |  0.94 | 2143628 B |        0.50 |
+| Class.StringCreator |   1071741 | 7,359,583.80 ns |  0.94 | 2143628 B |        0.50 |