Presentation of larger JSON output is slow

[TobiasNx]

https://test.metafacture.org/playground/?flux=%22https%3A//services.dnb.de/sru/zdb%22%0A%7C+open-sru%28query%3D%22dnb.isil%253DDE-Sol1%22%2CRecordSchema%3D%22MARC21plus-xml%22%2CVersion%3D%221.1%22%2CTotal%3D%222%22%29%0A%7C+decode-xml%0A%7C+handle-generic-xml%28recordTagName%3D%22collection%22%29%0A%7C+filter-records-by-path%28path%3D%22record%22%29%0A%7C+encode-json%28prettyPrinting%3D%22true%22%29%0A%7C+print%3B%0A

It first loads the opening bracket, then a couple of lines, when scrolling then it stucks and slowly loads the next lines. @Phu2 might this be just a problem of missing CPU?