For SmartSVN we are optionally displaying merge arrows in the Revision Graph. Here is a sample image, how this looks like:
http://imgur.com/MzrLq00 >From the JavaHL sources I understand that there is currently only one method to retrieve server-side mergeinfo and this one works on a single revision only: Map<String, Mergeinfo> getMergeinfo(Iterable<String> paths, long revision, Mergeinfo.Inheritance inherit, boolean includeDescendants) This makes the Merge Arrow feature practically unusable for larger graphs. To improve performance, in earlier versions we were using a client-side mergeinfo cache (similar as the main log-cache, which TSVN is using as well). However, populating this cache (i.e. querying for mergeinfo for *every* revision of the repository) often resulted in bringing the entire Apache server down, especially if many users were building their log cache at the same time. To address these problems, it would be great to have a more powerful API, which allows either to retrieve all mergeinfo for a *revision range* or for a *set of revisions*. Querying a set of revisions would be more flexible and would allow to generate merge arrows on the fly. On the other hand, to alleviate the server, it's desirable to cache retrieved mergeinfo on the client-side anyway, hence a range query would be fine as well. -Marc
