We are using 30 mb large byte string represented as base64 binary type in shema and it is causing out of memory for us on server. Basically converting from base64 string to byte is not very efficient.
JavaBase64Holder.java is using: vBytes = v.getBytes("UTF-8") and according to http://www.evanjones.ca/software/java-string-encoding-internals.html it uses base64 size * 4. In our case where there is 30mb large byte it uses around 160 mb just for converting string into byte.
Would it be possible to use v.getBytes("ASCII")? This would reduce the memory usage when converting from string to byte by 4 times.
According to http://www.w3.org/TR/xmlschema-2/#base64Binary it should use only ASCII chars anyway.