From 6da92d96aec29ab09cf909ac6a270bc2753cd34a Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Thu, 24 Oct 2013 02:22:24 +0200
Subject: Document NIX_SHOW_STATS and NIX_COUNT_CALLS

---
 doc/manual/env-common.xml | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'doc/manual')

diff --git a/doc/manual/env-common.xml b/doc/manual/env-common.xml
index e6a358931..9e97e58f5 100644
--- a/doc/manual/env-common.xml
+++ b/doc/manual/env-common.xml
@@ -312,6 +312,24 @@ $ mount -o bind /mnt/otherdisk/nix /nix</screen>
 </varlistentry>
 
 
+<varlistentry><term><envar>NIX_SHOW_STATS</envar></term>
+
+  <listitem><para>If set to <literal>1</literal>, Nix will print some
+  evaluation statistics, such as the number of values
+  allocated.</para></listitem>
+
+</varlistentry>
+
+
+<varlistentry><term><envar>NIX_COUNT_CALLS</envar></term>
+
+  <listitem><para>If set to <literal>1</literal>, Nix will print how
+  often functions were called during Nix expression evaluation.  This
+  is useful for profiling your Nix expressions.</para></listitem>
+
+</varlistentry>
+
+
 <varlistentry><term><envar>GC_INITIAL_HEAP_SIZE</envar></term>
 
   <listitem><para>If Nix has been configured to use the Boehm garbage
-- 
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