Tamarin:WeeklyUpdates

These updates concern Tamarin and related projects only.

Meeting Details

• 2:00pm Pacific Time (21:00 UTC) on Tuesdays
  • (5PM Eastern US, 11PM Oslo, 6AM (Wed) Seoul, 7AM (Wed) Melbourne)
• Meeting ID: 8262746 (TAMARIN)
  • California: 408-536-9900
  • Toll-Free(US & Canada): 877-220-5439
  • International: +1-408-536-9900
• Duration: 60 minutes
• join irc.mozilla.org #tamarin for attendence taking and questions

4th December 2007

Moh Marcia Benjamin Ed Brendan Seo Markh Rick Shengnan Jason Erik

Moh

• Basic call graph working.
  • Business dev preso, open up vtune. Went well.
  • Licensing support. Team would have to commit to support.
  • Also want to know how does newer perf tools relate to vtune?

Marcia

• Wants more JS speed tests
• Object array. Unshift bug needs to be filed
• A lot of time spend in GC. Not sure how that compares to other engines

Seo

• Currently working on translating MSIL exception handling to ABC
  • necessary to support Iron* runtime (?)
• Goal: C# "hello world" to MSIL to ABC

Steven

• Has patch for review by Edwin. A grab-bag of FP changes, maybe 12 bug fixes

Jason

• Running Tamarin tests on Mac results in six failures. Not clear what the

cause is

• Wants to land mmgc thread safe this week. Will post an updated patch.

Mark H

• State management working properly.
• Summary of global object issue
  • AS3 has one global object per ABC.
  • This is not how the browser work.
  • [Ed] Use façade as a clearing house for various binding
  • ESC should be able define a façade with modification of Tamarin
  • This is TBD

Discussion

• Moh/Marcia: is there any performance documentation or benchmarks?
• Tommy: UCI team has ported JavaGrande to Tamarin
• Ed: short running test are our focus
• Jeff: it would be interesting to profile ESC

• Benjamin: MMGC question about back references. <sorry had to leave the room>

27th November 2007

Jason -

• mmgc thread safe posted as patch ready for review
  • tom to review by end of week
• large corresponding patch in Spidermonkey pending

Moh (Vtune) -

• Good progress with the call graph
• Vtune issue with call graph in the rt library; fixed by Vtune team
• Vtune biz dev working on making interface of Vtune to public
  • Need to make header file public for integration with Tamarin
  • May need support from us to convince Intel biz dev that it is helpful and should be made public
  • The license is TBD
  • Brendan notes that the licensing must be compatible with Mozilla's.

Mark H (ScreamingMonkey)

• Demo didn't quite make it for Brendan's last talk
• Working with Brent to get the headless chessapp
  • The JIT version is 15x the Jscript.NET versiom, 20x slower than C#

• Sent mail to tamarin-devel regarding global objects; response from Ed
• ESC is quite slow
• Would like to see ESC integrated into the build environment;

Seo (ironmonkey)

• Using Cli disassembler library (Cecil)
• Will use OP_callmethod to map early bound cli instructions to Tamarin

Various

• John Resig / Brent are investigating a performance problem (probably an infinite loop)
• Quick, somebody file a bug! and copy brendan@mozilla.org

Older meetings

• November 7, 2007
• October 30, 2007
• October 23, 2007
• October 16, 2007
• October 9, 2007
• October 2, 2007
• September 25, 2007
• September 18, 2007
• September 11, 2007
• September 4, 2007
• August 28, 2007
• August 14, 2007
• August 7, 2007
• Meeting Announcement