Add documentation for ber encode nif optmization

1 files changed, 7 insertions, 3 deletions

diff --git a/lib/asn1/doc/src/asn1ct.xml b/lib/asn1/doc/src/asn1ct.xml
index d7c2572dc8..13e6977419 100644
--- a/lib/asn1/doc/src/asn1ct.xml
+++ b/lib/asn1/doc/src/asn1ct.xml
@@ -225,8 +225,8 @@ Binary = binary()
           <item>
             <p>Option valid together with <c>ber_bin</c> and <c>optimize</c>
 	      options. It enables the use of several nifs that gives faster 
-	      decode. Nifs are only enabled by the explicit use of the option 
-	    <c>nif</c></p>
+	      encode and decode. Nifs are only enabled by the explicit use of 
+	      the option <c>nif</c></p>
           </item>
           <tag><c>asn1config</c></tag>
           <item>
@@ -269,7 +269,11 @@ Binary = binary()
               <c>.set.asn</c> are exported, unless a
               <c>{export,[atom()]}</c> or <c>{export_all,true}</c> option
               are provided. The list of atoms are names of chosen asn1
-              specs from the <c>.set.asn</c> file.</p>
+              specs from the <c>.set.asn</c> file. </p>
+	      <p>When used together with <c>nif</c> for <c>ber_bin</c>, the
+	      asn1 nifs will be used if the <c>asn1rt_nif</c> module is 
+	      available. If it is not available, a slower erlang fallback
+	      will be used.</p>
           </item>
           <tag><c>inline</c></tag>
           <item>