bug#13369: 24.1; compile message parsing slow because of omake hack

[Mattias Engdegård]

8 jan 2013 kl. 21.14 skrev Glenn Morris:

> Thanks. Could you also give the numbers for
> compilation-error-regexp-alist containing only `gnu' (assuming that is
> the one that is relevant for your test case)?

These times are with a slightly different compilation buffer:

  all   no omake   gnu only
 32.7     3.4        0.3      standard code
  6.8     3.4        0.3      repaired regexp (escaped ^)
  3.4     3.4        0.3      COND expression removed