VIATRA/DeveloperMeetingMinutes/Meeting20170223

Topics

• Bugzilla status: VIATRA
• Tasks from last meeting:
  • DONE Gabor: consult Balázs Grill for recursive examples for DRED measurements
  • DONE Istvan: write comment on non-determinism issue to show we care
• Slowdown of VIATRA editor between 1.2 and 1.5
  • Disable automatic target platform update: https://git.eclipse.org/r/#/c/91545/
  • Another possible change: https://git.eclipse.org/r/#/c/91684/1
• Functional changes between 1.2 and 1.5
• Tutorial migration to eclipse.org
• Demo
  • Nasz: DSE editor
  • Gábor Szárnyas: ingraph

Minutes

• DRED measurements for recursive examples
  • Tried on some examples
  • Model not big enough, no significant slowdown found
  • (And no slowdown expected, DRed should theoretically handle this case without a performance loss)
• Regression between 1.2 and 1.5
  • Slow editor and code generation performance (may be related to type inferrer)
  • Proxy and dangling edge corner case where match set changed
  • Will need some detailed testing to improve on both
• Istvan: 1.5.2
  • Switch back default for Eval node caching
  • Hot-fixes for regressions
• Tutorial CQ started, will probably transition wiki content as well
• DSE Editor demo
  • Xtext based DSL for the DSE API
  • Generates Java code from the config
  • Currently does not really abstract from Java API
  • On GitHub under VIATRA org
  • Not planned for Eclipse.org contribution
• InGraph demo
  • Presented at FOSDEM
  • Gabor also went to OCIM
  • Incremental query evaluation for OpenCypher
  • http://www.opencypher.org/event/2017/02/08/event-ocim1/
  • https://s3.amazonaws.com/artifacts.opencypher.org/website/ocim1/slides/15-30+-+Language+Evolution-+Future+Features.pdf
  • http://wiki.ldbcouncil.org/pages/viewpage.action?pageId=59277315
  • https://twitter.com/rvanbruggen/status/834710081174384641