[Bug c++/101163] slow compilation for huge classes (>20k members)

[rbuergel at web dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101163

--- Comment #1 from René Bürgel <rbuergel at web dot de> ---
-ftime-report for trunk-gcc says:
Time variable                                   usr           sys          wall
          GGC
 phase setup                        :   0.00 (  0%)   0.00 (  0%)   0.01 (  0%)
 1562k (  4%)
 phase parsing                      :   4.75 (100%)   0.11 (100%)   5.09 (100%)
   36M ( 96%)
 |name lookup                       :   4.51 ( 95%)   0.05 ( 45%)   4.76 ( 93%)
 2088k (  5%)
 garbage collection                 :   0.01 (  0%)   0.00 (  0%)   0.01 (  0%)
    0  (  0%)
 preprocessing                      :   0.04 (  1%)   0.05 ( 45%)   0.07 (  1%)
 4449k ( 12%)
 parser (global)                    :   0.02 (  0%)   0.00 (  0%)   0.04 (  1%)
 3647k (  9%)
 parser struct body                 :   4.63 ( 97%)   0.05 ( 45%)   4.91 ( 96%)
 9128k ( 24%)
 symout                             :   0.05 (  1%)   0.01 (  9%)   0.06 (  1%)
   19M ( 51%)
 TOTAL                              :   4.75          0.11          5.10       
   37M


It seems to be an issue in the name lookup, if I interpret that right...