As noted by Ryan Rockenbaugh in SOLR-13963, javabin also recently became orders of magnitude slower in certain cases since v7.7. The cases identified so far include large numbers of values in a field.
BinaryResponseWriter (javabin format) should directly copy from Bytesref to output
JavabinLoader should avoid creating String Objects and create UTF8CharSequence fields from byte
backport SOLR-14013 to Solr 7.7