Exercise

Optimizing a financial analysis application

As a Java developer for a financial analysis application, you've identified that one of your report-generation methods is creating excessive garbage and triggering frequent garbage collections. The report concatenates thousands of data points into a single string. You need to refactor this code to be more GC-friendly while maintaining the same functionality.

Instructions

100 XP

Create a new StringBuilder instance of the necessary length.
For every value in dataPoints, add the formatted value in the string builder.
Convert the StringBuilder to a String and return it.

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Instructions

Exercise