When we select a numerical scheme, we should evaluate the overall work
efficiency instead of just the computational efficiency. If the
objective is to develop a program that is to be used routinely, it
would be worth investing the time to achieve computational efficiency
to the best we can. For a program that is to be used only once, it may
be sensible to choose a scheme that is easy to code, even if the
efficiency is somewhat sacrificed. The choice of schemes will depend
on how the program is to be used.

选择数值方案时，我们应该评估整体工作效率，而不是仅仅评估计算效率，如果目标是开发一个日常使用的程序，则值得花费时间来达到最佳计算效率我们可以，对于仅使用一次的程序，即使牺牲了一些效率，选择易于编码的方案也是明智的选择方案的选择将取决于该程序的使用方式…