Optimized parse method of TupleLineParser by creating less helper objects and replacing method calls by direct operations on variables. We now only create a StringBuilder object uesc when it is needed (when an escaped character is detected in the tuple line). In most tuple data lines no escape characters are used and thus the StringBuilder object was not used/needed. Also increased the default capacity of StringBuilder uesc such that it is not enlarged so often. Also made StringBuilder object uesc now part of the TupleLineParser object, such that it can be reused by many parse() calls, again reducing the number of created StringBuilder objects.