I'm wondering the performance of reflection in this situation. I'm iterating a (probably) large excel file (let's say 3000 max) which it's going to be done from time to time, and the implementation that my mate is something like this, iterating each row:            while (cells.hasNext()) {                XSSFCell cell = (XSSFCell) cells.next();                String cellData = this.getCellData(cell);                if (cellData.trim().isEmpty()) {                    break;                }                Field field = RowPrestacionVO.class.getField(fields.get(idx));                field.set(vo, cellData);                idx++;            }Is there any probability that I'm going to have some performance issues iterating like that?
Reflection performance in this iteration of a (probably) large excel file
java;performance;excel;reflection
While reflection is slow, doing it a handful of thousand times while processing a file will probably not be an issue: the file access is likely to be slower still.Still, you should be able to improve the performance of the code you posted by moving the initiation of ' field' outside of your loop.