PDFBox Merge with iText compression

import org.apache.pdfbox.util.*
import com.itextpdf.text.pdf.*
import com.itextpdf.text.*

@Grapes([
        @Grab(group='org.apache.pdfbox', module='pdfbox', version='1.2.1'),
        @Grab(group='com.itextpdf', module='itextpdf', version='5.1.3')
])

PDFMergerUtility merger = new PDFMergerUtility()
100.times {
    merger.addSource('test.pdf')
}
merger.setDestinationFileName('uncompressed.pdf')
merger.mergeDocuments()

PdfReader reader = new PdfReader(new FileInputStream('uncompressed.pdf'))
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream('compressed.pdf'))
int total = reader.getNumberOfPages() + 1
total.times {
    reader.setPageContent(it + 1, reader.getPageContent(it + 1))
}
stamper.setFullCompression()
stamper.close()