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# A.31. Timing Results

These timing results are from running the regression test with the commands

    % cd src/test/regress
    % make all
    % time make runtest

Timing under Linux 2.0.27 seems to have a roughly 5% variation from run to run, presumably due to the scheduling vagaries of multitasking systems.

## A.31.1. Version 6.5

As has been the case for previous releases, timing between releases is not directly comparable since new regression tests have been added. In general, 6.5 is faster than previous releases.

Timing with `fsync()` disabled:

      Time   System
      02:00  Dual Pentium Pro 180, 224MB, UW-SCSI, Linux 2.0.36, gcc 2.7.2.3 -O2 -m486
      04:38  Sparc Ultra 1 143MHz, 64MB, Solaris 2.6

Timing with `fsync()` enabled:

      Time   System
      04:21  Dual Pentium Pro 180, 224MB, UW-SCSI, Linux 2.0.36, gcc 2.7.2.3 -O2 -m486

For the linux system above, using UW-SCSI disks rather than (older) IDE disks leads to a 50% improvement in speed on the regression test.

## A.31.2. Version 6.4beta

The times for this release are not directly comparable to those for previous releases since some additional regression tests have been included. In general, however, 6.4 should be slightly faster than the previous release (thanks, Bruce!).

      Time   System
      02:26  Dual Pentium Pro 180, 96MB, UW-SCSI, Linux 2.0.30, gcc 2.7.2.1 -O2 -m486

## A.31.3. Version 6.3

The times for this release are not directly comparable to those for previous releases since some additional regression tests have been included and some obsolete tests involving time travel have been removed. In general, however, 6.3 is substantially faster than previous releases (thanks, Bruce!).

      Time   System
      02:30  Dual Pentium Pro 180, 96MB, UW-SCSI, Linux 2.0.30, gcc 2.7.2.1 -O2 -m486
      04:12  Dual Pentium Pro 180, 96MB, EIDE, Linux 2.0.30, gcc 2.7.2.1 -O2 -m486

## A.31.4. Version 6.1

      Time   System
      06:12  Pentium Pro 180, 32MB, EIDE, Linux 2.0.30, gcc 2.7.2 -O2 -m486
      12:06  P-100, 48MB, Linux 2.0.29, gcc
      39:58  Sparc IPC 32MB, Solaris 2.5, gcc 2.7.2.1 -O -g

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