actual result

uploader updates the UI each 1000ms with upload progress information
dropupload updates the UI each 100ms with upload progress information

expected result

uploader and dropupload behavior should be coherent, and both should update the UI at the same rate. (100ms, unless performance issues require otherwise)

debug info

uploader:
https://github.com/zkoss/zk/blob/4f24fc11451896b7c03f720a584aba509512a0f9/zul/src/archive/web/js/zul/Upload.js#L433

dropupload:
https://github.com/zkoss/zkcml/blob/ff7246732ef98c5b9b4ab94e11c937bf6d2a12a4/zkmax/src/archive/web/js/zkmax/wgt/Dropupload.js#L812