patch 8.0.1002: unnecessarily updating screen after timer callback commit https://github.com/vim/vim/commit/02e177d3e85e089ebdfba1a7d937150cffcb287a Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 26 23:43:28 2017 +0200 patch 8.0.1002: unnecessarily updating screen after timer callback Problem: Unnecessarily updating screen after timer callback. Solution: Check if calling the timer sets must_redraw.

/* auto/if_perl.c */
int perl_enabled(int verbose);
void perl_end(void);
void msg_split(char_u *s, int attr);
void perl_win_free(win_T *wp);
void perl_buf_free(buf_T *bp);
void ex_perl(exarg_T *eap);
void do_perleval(char_u *str, typval_T *rettv);
void ex_perldo(exarg_T *eap);