allow inlining (this did not provide a statistically significant performance boost - oh well)

src/variable.rs

@@ -5,6 +5,7 @@ pub struct Variable {
 }
 
 impl From<String> for Variable {
+    #[inline]
     fn from(string: String) -> Variable {
         let id_value: Vec<&str> = string.lines().collect();
         let id = id_value[0].replace("VAR ", "").to_string();