mydumper: FTWRL too long due to g_list_append poor performance

[nong LO]

When backuping 977 databases with 293 tables, which total to 286 261 tables, mydumper set FTWRL for a least 30 minutes.
At first mydumper process "SHOW TABLE STATUS" quite fast, then slow down quickly.

[nong LO (nong-lo)]

It would be way faster to use g_list_append follow by g_list_reverse.

[nong LO (nong-lo)]

I mean g_list_prepend

[Domas Mituzas (domas-mituzas)]

hm, isn't it a double-linked list, why would append be slow?

[nong LO (nong-lo)]

It seem glist does not have the link to the list tail, so in order to append, it has to traverse the entire list.