Compilation performance comparison of 3.5.0 and TreeSSA trees on MICO sources as requested in: [tree-ssa] Merge status 2004-05-03

[Gerald Pfeifer]

On Wed, 5 May 2004, Joe Buck wrote:
> The purpose of doing some optimization is to make -O0 *faster*.  We've
> already got a 20% speed degradation any you want to allow 5% *more*?

To illustrate Joe's point, and excerpt from one of my Makefiles:

  #  (-O1 is required for some warning invoked by -W, and it is indeed
  #  faster than -O0 as of 2001-08-30 on i386-unknown-freebsd4.3.)

> Applying some low-cost optimizations for space will make the
> compiler+assembler+linker run *faster*.

Indeed.

Gerald