How can you optimize BeanShell script performance without migrating to another engine?

Minimize the amount of work the script actually does per execution - move any computation that doesn't need to vary per-iteration outside the script's hot path entirely, such as precomputing a value once, in a setUp Thread Group for instance, rather than recalculating it identically inside a script that runs on every single iteration.

Avoid unnecessary object creation inside the script, since object allocation inside an interpreted execution path adds cost on top of the interpretation overhead itself, and BeanShell doesn't get the JIT-style optimization benefits a long-lived, cached, compiled script might accumulate over repeated calls the way JSR223's cached engines can.

Keep the script's logic as simple and short as practically possible, since BeanShell's per-execution interpretation cost scales roughly with how much there actually is to interpret - a shorter, more focused script has less for the interpreter to walk through on each run than an equivalent but more verbose or convoluted one.

Where feasible, reduce how often the script actually needs to run at all - for example, restructuring a test plan so a BeanShell element that could be scoped at the Thread Group's setup rather than inside the main per-iteration loop only executes once per thread instead of once per iteration, directly cutting the number of times its interpretation overhead is paid across the test.

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