-The time the "make" step takes depends heavily on optimization levels.
-Large amounts of memory (>128MB) will be required by the compiler,
-also depending on optimization. To give you a rough idea of what you
-have to expect the following table may be helpful. It was measured on
-an Athlon/800MHz with "enough" memory:
+The time the "make" step takes depends on optimization levels. To give you
+a rough idea of what you have to expect the following table may be helpful.
+It was measured on an Athlon X2/3GHz with 4Gb of RAM.
+
+step | GCC optimization | comment
+ | -O1 | -O2 |
+--------------+---------+---------+----------------------------------------
+make | ~1m | ~2m | shared library only (--disable-static),
+ | | | parallel compilation (MAKEFLAGS=-j2)
+make check | ~6m | ~6m | largely due to compilation
+
+
+To install from git
+===================
+
+First, download the code:
+ $ git clone git://www.ginac.de/ginac.git ginac
+ $ cd ginac
+
+Secondly, make sure all required software is installed. This is *really*
+important step. If some package is missing, the `configure' script might
+be misgenerated, see e.g. this discussion:
+<http://www.ginac.de/pipermail/ginac-list/2007-November/001263.html>
+
+Finally, run