Few amends on the slides

slides.tex

@@ -152,7 +152,7 @@ $1 = 84
 
                 \vspace{2em}
 
-                \only<2>{We only have \reg{rsp} and \reg{rip}.}
+                \onslide<2>{We only have \reg{rsp} and \reg{rip}.}
 
             \end{center}
         \end{column}
@@ -323,15 +323,6 @@ $1 = 84
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \section{Unwinding data validation}
 
-\begin{frame}{Main idea}
-    \begin{itemize}
-        \item If we follow \alert{one path of execution}, we can track the
-            return address location
-        \item If we read unwinding data \alert{at runtime}, we can \alert{check
-            the RA consistency} at each step
-    \end{itemize}
-\end{frame}
-
 \newcommand{\tblrowval}[4]{#1 & #2 & \only<2->{#3} & \only<2->{#4} \\}
 \newcommand{\blknote}[1]
     {\begin{block}{}
@@ -345,7 +336,7 @@ $1 = 84
     \end{block}}
 \newcommand{\tblhl}{\rowcolor{Tan}}
 
-\begin{frame}{Example}
+\begin{frame}{Validating an example}
     \newcommand{\firsttblrows}{
 \tblrowval{\hspace{-2ex}<{\bf foo}>:}{}{\textbf{CFA}}{\textbf{ra}}
 \rowonly<3>{\tblhl{}}  \tblrowval{push}{\%r15}{rsp+8}{c-8}
@@ -591,7 +582,7 @@ $1 = 84
     \begin{itemize}
         \item \alert{Upon split} (eg. \texttt{X})\alert{:} nothing special,
             propagate end state of X to children nodes A and B
-        \item \alert{Upon join} (eg.\texttt{while\_end})\alert{:} check
+        \item \alert{Upon join} (eg. \texttt{while\_end})\alert{:} check
             consistency of both input states
             \begin{itemize}
                 \item If tricky, \texttt{gcc} will have used \reg{rbp}, even
@@ -639,11 +630,39 @@ $1 = 84
     \end{columns}
 \end{frame}
 
+\begin{frame}{}
+    \vfill
+    \centering
+    \begin{beamercolorbox}[sep=8pt,center,shadow=true,rounded=true]{title}
+        \Large\bf
+        Demo time!
+    \end{beamercolorbox}
+    \vfill
+\end{frame}
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \section{Unwinding data compilation}
 
 \subsection{Compilation ahead-of-time}
 
+\begin{frame}{Why compiling?}
+    \begin{itemize}
+        \item Remember that \alert{DWARF is slow}!
+        \item \alert{Bytecode} interpreted \alert{on the fly} to
+            generate the data tables
+        \item Done so for \alert{extreme compacity}
+    \end{itemize}
+
+    \pause{}
+    \vspace{1em}
+
+    \begin{itemize}
+        \item Goal: \alert{reasonable time-space trade-off} to speed up DWARF
+        \item Tables are now \alert{compiled functions} returning the requested
+            DAWRF row
+    \end{itemize}
+\end{frame}
+
 \begin{frame}{Compilation overview}
     \begin{itemize}
         \item Compiled to \alert{C code}
@@ -718,13 +737,7 @@ $1 = 84
 
 \begin{frame}{Size optimisation: outlining}
     \begin{itemize}
-        \item This \alert{works}, but \alert{takes space}: about \alert{7 times
+        \item Most of the rows boil down to \alert{a few common rows}.
-            larger in size} than regular DWARF\@.
-
-        \item DWARF optimisation strategy: \alert{alter previous row}. \\
-            Causes slowness: we cannot do that.
-
-        \item Remark: a lot of lines appear often.
             \begin{itemize}
                 \item[$\leadsto$] \textbf{\emph{outline} them!}
             \end{itemize}