diff --git a/report/report.tex b/report/report.tex
index e88b76b..9269df6 100644
--- a/report/report.tex
+++ b/report/report.tex
@@ -822,16 +822,17 @@ Listing~\ref{lst:ex1_dw}, etc.
 \subsection{Presentation of \prog{perf}}
 
 \prog{Perf} is a \emph{profiler} that comes with the Linux ecosystem (actually,
-\prog{perf} is developed within the Linux kernel source tree). A profiler is a
-program that analyzes the performance of programs by recording the time spent
-in each function, including within nested calls.
+\prog{perf} is developed within the Linux kernel source tree). A profiler is an
+important tool from the developer's toolbox that analyzes the performance of
+programs by recording the time spent in each function, including within nested
+calls. This analysis often enables programmers to optimize critical paths and
+functions in their programs, while leaving unoptimized functions that are
+seldom traversed.
 
 For this purpose, the basic idea is to stop the traced program at regular
 intervals, unwind its stack, write down the current nested function calls, and
 integrate the sampled data in the end.
 
-\todo{Is it necessary to write more about \prog{perf} here?}
-
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \subsection{Benchmarking with \prog{perf}}\label{ssec:bench_perf}