small improvement of benchmark function

paper/paper.tex

@@ -6,11 +6,11 @@
 
 
 % ready for submission
-\usepackage{neurips_2022}
+% \usepackage{neurips_2022}
 
 % to compile a preprint version, e.g., for submission to arXiv, add add the
 % [preprint] option:
-%     \usepackage[preprint]{neurips_2022}
+\usepackage[preprint]{neurips_2022}
 
 
 % to compile a camera-ready version, add the [final] option, e.g.: