Golden Code Redmine

06/15/2026

02:59 PM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

I added temporary lexer profiling in order to measure the token generation cost per token type, aggregated across all... Paula Păstrăguș

06/12/2026

08:42 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Before moving forward, another project conversion progressed further than in previous attempts, it reached the *serve... Paula Păstrăguș

08:35 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Another slowdown source is the @evaluateExpr@ method: under ANTLR2, Hotel GUI spends *5.3 seconds* in it, whereas und... Paula Păstrăguș

06/11/2026

08:16 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

10804b is at rev *16584* now (here you can find today's parser improvements). Paula Păstrăguș

08:03 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

I also attached a log file in my previous post. It includes the total time ANTLR4 spends in prediction mode for each ... Paula Păstrăguș

08:00 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Hmm, for Hotel GUI, @createShadowNodes@ takes around @0.2@ seconds in total, which seems reasonable from my POV. (we ... Paula Păstrăguș

07:45 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

*Update*: Hotel GUI performance comparison between ANTLR2 and ANTLR4.
|_. Metric |_. ANTLR2 |_. ANTLR4 |
| Total ... Paula Păstrăguș

06/10/2026

10:12 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

10804b is at rev *16583* now (the latest). Paula Păstrăguș

10:04 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Greg, it is not 3x slower anymore, it is only around 2x now, and I think I can still push the boundaries:) Paula Păstrăguș

10:00 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

*Update*: the current Hotel GUI parse time is *49 seconds*. I think I can still improve this further through parser c... Paula Păstrăguș

09:20 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Right, I remember having this error from the very beginning, basically two years ago:-)
Anyway, I think a fresh ch... Paula Păstrăguș

07:11 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Greg Shah wrote:
> ANTLRv2 and ANTLRv4 both have their loops and optional alternatives set to be greedy by default. ... Paula Păstrăguș

07:06 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Paula Păstrăguș wrote:
> Greg Shah wrote:
> > > This suggests that we may also need some special tricks for cases w... Paula Păstrăguș

07:06 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Greg Shah wrote:
> > This suggests that we may also need some special tricks for cases where a @no viable alternativ... Paula Păstrăguș

06:23 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Greg, is a @()*@ construct in ANTLR2 greedy or non-greedy by default? I only found three @options@ blocks with @greed... Paula Păstrăguș

06:11 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Another important thing I noticed is that the ANTLR4 prediction algorithm does not seem to provide a reliable way to ... Paula Păstrăguș

05:44 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

*Update*: Hotel GUI parse time has now dropped to *1 minute and 8 seconds*, with a total conversion time of *5 minute... Paula Păstrăguș

06/09/2026

10:22 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

The lexer doesn't appear to be the bottleneck. Using @tokens.fill()@ and summing the elapsed times across all Hotel_G... Paula Păstrăguș

09:42 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

I think it is time to document some findings and updates here.
At this point, I think I have stabilized the Progre... Paula Păstrăguș

05/28/2026

05:29 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

I've already reduced @primary_expr@ prediction time from seconds down to nanoseconds, but that alone isn't enough. I ... Paula Păstrăguș

05/27/2026

10:03 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

I am currently trying one more approach for the ANTLR4 performance issue around @primary_expr@.
The main problem i... Paula Păstrăguș

02:12 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

The main performance culprits still appear to be the "pull" alternatives. @adaptivePredict@ needs these alternatives ... Paula Păstrăguș

02:43 AM Runtime Infrastructure Feature #10451 (Test): GUI interaction event logging

Branch 10451a was merged into trunk as rev. @16583@ and archived. Paula Păstrăguș

02:16 AM Runtime Infrastructure Feature #10451: GUI interaction event logging

I have Serban's approval for testing with another application and Teodor's approval for the ChUI Regression Testing. ... Paula Păstrăguș

05/26/2026

01:40 AM Runtime Infrastructure Feature #10451: GUI interaction event logging

Here are the results from yesterday:
* gso_282 failed: expected.
* gso_320 failed: not expected. However, Teodor ... Paula Păstrăguș

05/25/2026

05:54 AM Runtime Infrastructure Feature #10451: GUI interaction event logging

I started the ChUI regression tests. In the best case scenario, we should have the results by EOD. Paula Păstrăguș

05:39 AM Runtime Infrastructure Feature #10451: GUI interaction event logging

10451a was rebased, new rev is *16589*. Paula Păstrăguș

04:23 AM Runtime Infrastructure Feature #10451: GUI interaction event logging

The wiki has been updated and is available at [[p2j:Debugging GUI]].
Regression testing did not reveal any issues.... Paula Păstrăguș

03:20 AM Runtime Infrastructure Feature #10451: GUI interaction event logging

Addressed as rev *16524*.
I'm starting regression testing. Paula Păstrăguș

02:12 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

We need to take some calculated risks.. otherwise, as you said, we will not be able to move forward with ANTLR4. I ma... Paula Păstrăguș

05/22/2026

10:57 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Here are some relevant values regarding performance issue:
For @avail-rooms-frame.w@, the total time spent into pr... Paula Păstrăguș

10:53 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Greg Shah wrote:
> In pre-scan mode we are trying to do a minimal parse to get some structural elements without worr... Paula Păstrăguș

10:52 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Sorry for the delay, right now, when trying to commit today changes I find out the connection of off.. Paula Păstrăguș

10:50 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Most of the time is spent in primary_expr decision. I tried to split it.. but I had no luck, the total time for Hotel... Paula Păstrăguș

04:00 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Current issue I'm working on:
I moved testing to @<app_c>@, at least to check whether the files parse correctly du... Paula Păstrăguș

05/21/2026

10:26 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Committed the baseline as rev *16576 / 10804b*.
A @./gradlew antlr4All@ followed by @./gradlew jar@ should work no... Paula Păstrăguș

06:46 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

Well, it all started because the old 10804a version no longer compiled, and I couldn't realistically make it work aga... Paula Păstrăguș

06:14 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

It is available at rev *16495 / 10804a*.
Let me create the b version now and port all my changes there. After a b... Paula Păstrăguș

04:36 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

I fixed the issue, and fortunately it was not a problem in the fql parser itself. I was accidentally calling the pars... Paula Păstrăguș

05/20/2026

10:20 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

I managed to get both the Hotel GUI server and the web client up and running! 🎉
At this point, there still seems t... Paula Păstrăguș

05/18/2026

10:42 AM Conversion Tools Feature #10804: create replacement AST implementation for use with ANTLR 4

*Update*: *All* Hotel GUI files are now converted (*66* files). I still need to check the generated Java files, ASTs,... Paula Păstrăguș