A Supreme Court judge has raised concerns over the length of time a 21-year-old Perth woman accused of murder will spend in custody awaiting trial.

Aya Hishmeh faced the WA Supreme Court on Monday via video link from Bandyup prison; she stands charged with murdering Jacob Cummins and attempting to kill teenagers Robert Bell, Augustine Janga, Mark Kickett and Anwre Ige.

Aya Hishmeh's murder trial is not expected to go ahead in the WA Supreme Court until November. Credit:9 News Perth

Jacob Cummins, 17, was killed after Ms Hishmeh allegedly ran him down with her car, while four of his friends were seriously injured.

The alleged incident followed a brawl at a McDonald’s involving rival groups of youths in Canning Vale on December 7, 2017.