Static vs Rolling
Several decades ago, back when using line charts and graphs, the company added 500 feet to the static takeoff roll. If the result was equal to greater than the runway available a static takeoff was required.
The older jet engines were also slower to accelerate particularly in the lower RPM ranges. Some engines were first set at a mid-range power setting prior to brake release. Some of the older large fan engines even set takeoff thrust and cooked the engine for 30 seconds prior to brake release.
Todays engines with variable stators have greatly improve throttle response, thank goodness.