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EMF has introduced a variety of load options that are intended to boost performance. Some of them have considerable benefits. GMF should evaluate these load options to see which it can apply by default to its resources, without perturbing any load semantics expected by clients. See http://eclipse.org/emf/docs.php?doc=http://eclipse.org/emf/docs/performance/EMFPerformanceTips.html for details.
An attempt was made to evaluate these load options in the context of a large EXTLibrary model. Unfortunately, no clear results could be generated. The rest of the default GMFResource load/save options have to do with specific file format requirements, etc. having none to do with performance. Clients should decide which options they wish to use either in their resource implementation or passed to the Resource.load(Map options) call.
[target cleanup] 1.0 M6 was the original target milestone for this bug
[GMF Restructure] Bug 319140 : product GMF and component Runtime EMF was the original product and component for this bug