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The main disadvantage of the bisection method for finding the root of an equation is that, compared to methods like the Newton-Raphson method and the Secant method, it requires a lot of work and a lot of iterations to get an answer with very small error, whilst a quarter of the same amount of work on the N-R method would give an answer with an error just as small.

In other words compared to other methods, the bisection method takes a long time to get to a decent answer and this is it's biggest disadvantage.

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Q: Disadvantages of the bisection method in numerical methods?
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What is the Real root of 1-0.6x divided by x using bisection method?

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