# HG changeset patch
# User Oleksandr Gavenko <gavenkoa@gmail.com>
# Date 1290377494 -7200
# Node ID c1def2bc1c9577c3c5d260d0331a58839a3fdc6c
# Parent  ea696337c28543dcdf1f76f1bc0352d34f569e62
Numbers everyone should know.

diff -r ea696337c285 -r c1def2bc1c95 devel.rst
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devel.rst	Mon Nov 22 00:11:34 2010 +0200
@@ -0,0 +1,17 @@
+-*- mode: outline; coding: utf-8 -*-
+
+* Numbers everyone should know.
+
+ * L1 cache reference 0.5 ns
+ * Branch mispredict 5 ns
+ * L2 cache reference 7 ns
+ * Mutex lock/unlock 100 ns
+ * Main memory reference 100 ns
+ * Compress 1K bytes with Zippy 10,000 ns
+ * Send 2K bytes over 1 Gbps network 20,000 ns
+ * Read 1 MB sequentially from memory 250,000 ns
+ * Round trip within same datacenter 500,000 ns
+ * Disk seek 10,000,000 ns
+ * Read 1 MB sequentially from network 10,000,000 ns
+ * Read 1 MB sequentially from disk 30,000,000 ns
+ * Send packet CA->Netherlands->CA 150,000,000 ns