'continue' command of gdb is slow when many breakpoints are set.

Issue

• When many breakpoints are set, "continue" command of gdb is slower than RHEL5.2(gdb-6.5).
• The processing time when gdb is executed on RHEL6.0 alpha in the following procedures is as follows.
  • Set 2000 breakpoints.
  • Run "continue" command 2000 times.
• I think that this issue is the same as IT#328066(BZ#520618) on RHEL5.3 and RHEL5.4.