Ed, it's not about speed, but about syntax sugar on "for cycles". you can go like that: 

 
/// do ##class(POI.Test).main() 
ClassMethod main(rounds As %Integer = 1000, size As %Integer = 10, nullPercent As %Integer = 20) {
 set list = ..getList(size, nullPercent) 
 write !,"Rounds: ", rounds 
 write !,"Size: ", size 
 write !,"NullPercent: ", nullPercent 
 write !,"List: " 
 zwrite list
for way="listnext", "listfind", "lfs", "base" {

  set start = $zh set list2 = $classmethod(,way, rounds, list)

  set end = $zh set time = end - start 
 write !,"Way: ", way 
 write !,"Time: ", time 
write !,"List: "
 zwrite list2

  write ! }

Well!

We already have two slots taken!

One is:

Static Analysis for ObjectScript with  CacheQuality 

It's a CI compatible static analysis to for ObjectScript codebase which finds bugs and obeys code guidlines using a set of managed rules from LiteSolutions (which is now better will sound as IRISQuality, @Daniel Tamajon? ;)

Another slot is a secret topic, will be announced just before the GS.

So we have two more, book your session on InterSystems IRIS Flash Talks from Developer Community!