Re: [ros-dev] Optimization Proposal - Ros-general

4 Jan 2006

Why not have threelevel of DBG
0 = DBG off
1 = as now
2 = -O2  with debug on.

and release build should change from -Oz to -O3
to gain more speed. the size is not a issue make it faster.
if the exe file are large or smaller- the large one can be faster that the
small one.

That is what I think

----- Original Message ----- 
From: "Ge van Geldorp" &lt;gvg(a)reactos.org&gt;
To: "'ReactOS Development List'" &lt;ros-dev(a)reactos.org&gt;
Sent: den 4 January 2006 09:35
Subject: RE: [ros-dev] Optimization Proposal

...
   - -O2 means
easier debugging. This point is really important
 because until I realized how true it was, I didn't want to
 bring this up. Here is a pseudo(but real) disassembly of
 something I've seen in my dbg = 1 kernel binary while debugging: 
 ... Lots of code

  This is how it looks with -O2 
 ... Far less code

  I hope we can all agree on which one of these is
readable. 
 For me the most readable is the source form, not the disassembly. Compiling
...
  with optimization turned on means the correspondence
between source and
 object forms is often broken, making tracing hard. Local variables are often
...
  kept in registers instead of on the stack and are much
harder to inspect.

 Since I seem to be just about the only one using a source-level debugger (I
...
  really cannot understand how the rest of you can live
without it, but that's
...
  just my opinion <g>) I don't want to block
the switch to -O2, but please
 create an easy way to switch it off.

 GvG

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