Processor Performance, Update 2004 SPEC CPU 2000 Integer
Performance Analysis Compiler and other software related
changes. As stated in the original article, factors other than
processor architecture and core frequency that influence overall
performance include: compiler, bus speed, cache size and other
factors. Figure 1 shows SPECint_base2000 scores for the Pentium
4 processor, 1.5GHz, 256K L2 cache, 400MHz FSB. The November
2000 (Intel C5.0) and August 2001 (IC5.0.1) results are on the
Intel D850GB motherboard. The November 2001 (IC5.0.1) result is
on the D850MD motherboard and the May 2002 (IC6.0) result is on
the D850EMV2. The first measurement used the version 5.0
compiler, the second and third used version 5.0.1 and the last
used version 6.0. Figure 1: Pentium 4 1.5GHz performance with
compiler improvements. Figure 2 shows the SPECint_base 2000
scores for the Pentium 4 2.0GHz/512K processor with the 5.01
(Nov-2001), 6.0 (May-2002), 7.0 (Jan-2003), and 8.0 (Sep-2003)
compilers. The motherboards for each