Retire two myths

1 files changed, 3 insertions, 28 deletions

diff --git a/system/doc/efficiency_guide/myths.xml b/system/doc/efficiency_guide/myths.xml
index 5d3ad78b23..7e2f3c8465 100644
--- a/system/doc/efficiency_guide/myths.xml
+++ b/system/doc/efficiency_guide/myths.xml
@@ -24,7 +24,7 @@
   The Initial Developer of the Original Code is Ericsson AB.
     </legalnotice>
 
-    <title>The Eight Myths of Erlang Performance</title>
+    <title>The Six Myths of Erlang Performance</title>
     <prepared>Bjorn Gustavsson</prepared>
     <docno></docno>
     <date>2007-11-10</date>
@@ -35,38 +35,13 @@
   <marker id="myths"></marker>
   <p>Some truths seem to live on well beyond their best-before date,
   perhaps because "information" spreads faster from person-to-person
-  than a single release note that says, for example, that funs
-  have become faster.</p>
+  than a single release note that says, for example, that body-recursive
+  calls have become faster.</p>
 
   <p>This section tries to kill the old truths (or semi-truths) that have
   become myths.</p>
 
   <section>
-    <title>Myth: Funs are Slow</title>
-    <p>Funs used to be very slow, slower than <c>apply/3</c>.
-    Originally, funs were implemented using nothing more than
-    compiler trickery, ordinary tuples, <c>apply/3</c>, and a great
-    deal of ingenuity.</p>
-
-    <p>But that is history. Funs was given its own data type
-    in R6B and was further optimized in R7B.
-    Now the cost for a fun call falls roughly between the cost for a call
-    to a local function and <c>apply/3</c>.</p>
-  </section>
-
-  <section>
-    <title>Myth: List Comprehensions are Slow</title>
-
-    <p>List comprehensions used to be implemented using funs, and in the
-    old days funs were indeed slow.</p>
-
-    <p>Nowadays, the compiler rewrites list comprehensions into an ordinary
-    recursive function. Using a tail-recursive function with
-    a reverse at the end would be still faster. Or would it?
-    That leads us to the next myth.</p>
-  </section>
-
-  <section>
     <title>Myth: Tail-Recursive Functions are Much Faster
     Than Recursive Functions</title>