Merge branch 'perf-exercises'

bobjacobsen · Aug 28, 2017 · c813068 · c813068
2 parents 2dc5fea + 380622d
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diff --git a/CSC/ex3.html b/CSC/ex3.html
@@ -136,5 +136,10 @@ <h1>Exercise 3: Demonstration of profiling tools</h1>
 (Hint: When checking
 factors, should you check <u>up to</u> the square root of the
 number, or <u>up to and including</u> the square root?)
+
+<P>
+Note:  You can't go too far with using sampling tools and small samples; those can really 
+mislead you.  See the article on "How Profilers Lie" in the 
+<a href="https://docs.google.com/document/d/1Jvb1zYRibzOw74VKnGsmTVfWkQcOxb_yc8JboebFDpA/edit#heading=h.so1co78qtmfd">Bilbiography</a> for more on this.
 </body>
 </html>
diff --git a/CSC/ex4.html b/CSC/ex4.html
@@ -99,8 +99,9 @@ <h1>Exercise 4: Practice tuning a small application</h1>
 There are some hints at the bottom.
 
 <P>
-I suggest you start by looking at where the program is spending its time. See if you can 
-improve that.  There are some obvious hot spots that will help you make progress.
+I suggest you start by looking afor evidence of where the program is spending unnecessary time. 
+See if you can improve those places first.  
+There are some obvious hot spots that will help you make progress.
 <P>
 Don't forget to recompile with ./build after changing the program!
 <p>