in the past we used the JQL Script Function linkedIssuesOf() to find Issues in certain Epics or Epics of certain Issues. In a newer version of the Script JQL Functions, it seems like there are some more convenient functions introduced (IssuesInEpics() and epicsOf()) to achieve the same result:
issuefunction in linkedIssuesOf(SUBQUERY, "is Epic of") issueFunction in issuesInEpics(SUBQUERY)
issuefunction in linkedIssuesOf(SUBQUERY, "has Epic") issueFunction in epicsOf(SUBQUERY)
Does those new functions have a better performance than the linkedIssuesOf() function? Does it make sense to migrate all existing Filters to use the new Functions?
No - performance will be identical. If one way was faster we'd do a migration job, or at least encourage people to change them manually. (You could probably verify they have similar performance characteristics using the provided profiler).
My advice would be to use epicsOf etc going forwards, as it's more intuitive and has a simpler syntax, but no need to migrate.
both functions are very well documented in the Adaptavist Wiki, including examples:
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