Hollywood's A product was getting longer—the top ten box-office releases of 1940 had averaged 112.5 minutes; the average length of 1955's top ten was 123.4. In their modest way, the Bs were following suit. The age of the hour-long feature film was past; 70 minutes was now roughly the minimum. While the Golden Age-style second feature was dying, "B movie" was still used to refer to any low-budget genre film featuring relatively unheralded performers (sometimes referred to as "B actors"). The term retained its earlier suggestion that such movies relied on formulaic plots, "stock" character types, and simplistic action or unsophisticated comedy. At the same time, the realm of the B movie was becoming increasingly fertile territory for experimentation, both serious and outlandish.