Julian Graham fe15364988 Improve performance of R6RS records implementation ... Reimplement record-type descriptors as vtables for record structs, saving us what was an expensive inspection of a record's vtable layout string to determine its type. * module/rnrs/records/inspection.scm (record-field-mutable?): Check mutability using the bit field stored in the record-type descriptor instead of the record struct's vtable. * module/rnrs/records/procedural.scm (record-internal?): Reimplement as a delegation to a check of the passed struct's vtable against `record-type-descriptor?'. (record-type-vtable): Modify to include base vtable layout as a prefix of the record-type-descriptor layout so that all record-type instances are now also vtables. (make-record-type-descriptor): Remove field vtable; build up a mutability bit field to use for fast mutability checks. (record-accessor, record-mutator): Use field struct and mutability bit field.		2010-10-22 14:34:49 -04:00
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inspection.scm	Improve performance of R6RS records implementation	2010-10-22 14:34:49 -04:00
procedural.scm	Improve performance of R6RS records implementation	2010-10-22 14:34:49 -04:00
syntactic.scm	Several fixes to R6RS libraries	2010-08-28 10:16:30 -07:00