This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. The main thing I did last month was shrinking the size of the opslot structure, which wraps each op when using slabs On 64-bit platforms this saves 8 bytes per allocated op. This work will be pushed shortly. SUMMARY: 3:43 RT #134275

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 40 tickets were reviewed, and 18 patches were applied 11.77 #122112 review, testing, comment #122112 research, set up VM #122112 try to diagnose issue on android, remove some extraneous debug output #122112 debugging, testing older versions

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. The main thing I have been doing over the last month is finishing off making optree-walking functions in op.c non-recursive and/or non-leaky. This work has now been merged into blead. SUMMARY: 2:18 RT #133902 Segfault in Perl_was_lvalue_sub 2:22 RT #134208 heap-use-after-free

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 30 tickets were reviewed, and 5 patches were applied 0.20 #121783 comment 7.98 #122112 re-work to save the pid instead of the fd #122112 more re-work, testing #122112 debugging, re-work differently #122112 work on a simpler fix

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 23 tickets were reviewed, and 2 patches were applied 0.74 #133878 debugging #133878 debugging, comment 0.38 #133909 review, porting test, minor fix, apply to blead 1.00 #133925 review code #133925 more code review 1.18 #133951 re-test,

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. The main thing I have been doing over the last month is to make the optree-walking functions in op.c non-recursive and/or non-leaky. In auto-generated code, such as $a and things involving arbitrary-deep nesting of braces and parentheses, it's easy during compilation to

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. The main thing I have been doing over the last month is continuing to fix issues related to smoke reports and getting blead in shape for the 5.30.0 release. In particular, I've been looking at Address Sanitizer failures related to memory leaks. SUMMARY:

Jonathan writes: March saw me spending rather little time on my Perl 6 grant. I merged various optimizations I developed during February, but held back to merge until after the March release in order that they could receive more testing before appearing in a release. I also did a few other minor optimizations, and fixed a performance regression introduced during a recent bug fix. During March, I attended the German

I'm pleased to announce that the Board of Directors approved Tony's request for another $20,000. It will allow him to dedicate another 400 hours to this work. I would like to thank the community members who took time to comment on this grant extension request and our sponsors who made funding the grant possible through the Perl 5 Core Maintenance Fund.

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 15 tickets were reviewed. 1.00 #131115 debugging, comment 3.29 #132782 work on tests, testing #132782 debugging, comment with tests and about the patches supplied. 3.61 #133888 debugging #133888 debugging, review code #133888 more debugging, code

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. The main thing I have been doing over the last month is fixing issues related to smoke reports. In particular, I've been looking at Address Sanitizer failures related to memory leaks. SUMMARY: 3:53 RT #133879> heap-use-after-free 0:53 RT #133886 heap-buffer-overflow

Jonathan writes: The majority of my Perl 6 grant time during February was spent on the escape analysis and scalar replacement work. Happily, the first round of work on this analysis and optimization reached the point of being complete and stable enough to merge into MoarVM master, so Perl 6 users can now benefit from it. I also made allocation profiling aware of scalar replacement, meaning profiling does not block

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 37 tickets were reviewed, and 9 patches were applied 0.85 #108276 re-test, apply to blead 12.83 #124203 reproduce, debugging at start of DB::sub>, try to bisect #124203 bisect some more, review results, notice change in bug and

Tony Cook has requested an extension of $20,000 for his Maintaining Perl 5 grant. This will allow him to dedicate another 400 hours to this work. During this grant he sent regular reports to the p5p mailing list as well as providing monthly summary reports that have been published on this site, the most recent of which are linked below: http://news.perlfoundation.org/2019/01/maintaining-perl-5-tony-cook-d-1.html http://news.perlfoundation.org/2019/02/maintaining-perl-5-tony-cook-j-1.html http://news.perlfoundation.org/2019/03/maintaining-perl-5-tony-cook-f-1.html Before we make a

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. This "monthly" report covers 3 months, as I've been failing to do much work on perl for a while. Hopefully things will improve now. The main thing I have been doing over this time is fixing issues related to smoke reports. In particular

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 54 tickets were reviewed, and 11 patches were applied 8.88 #108276 review #108276 check over committed changes, look to re-work, ask list about PERL_OP_PARENT #108276 cleanup PERL_OP_PARENT detritus #108276 review old patches, re-work, testing #108276 more

Jonathan writes: January was a busy and productive month for my Perl 6 grant work. Back in November, I was working on allowing us to lower lexical variables into locals. This is possible when they are not closed over, and allows for generation of more efficient code, which is in turn much easier for backends MoarVM, the JVM, and JavaScript to deal with in their own optimizers. It can also

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 27 tickets were reviewed or worked on, and 9 patches were applied. 0.52 Cpan #122912 followup 0.33 #131165 review, make public, comment and close 6.29 #133030 review discussion and my old patch, research #133030 testing, cross-platform testing, fixes

Jonathan Worthington has requested an extension of $20,000 for his Perl 6 Performance and Reliability Engineering grant. This will allow him to dedicate another 333 hours to this work. His previous work was successfully delivered as reported in the latest reports: July August September October November December Jonathan writes: "I recently wrote about some of the things I plan to work on for Perl

Jonathan writes: December came with some travel and vacation, and so wasn't ideal for working on the larger ongoing tasks. I did, however, get in numerous smaller fixes, as well as reducing the overhad on regex matching and improving the performance of regex interpolation. Other fixes included a memory leak that was observed to impact Cro applications, a couple of GC errors, and a crash involving a certain interaction of

Jonathan writes: In November I continued my work towards partial escape analysis and related optimiztions in MoarVM. In terms of the analysis itself, I spent some time designing and starting to implement deoptimization handling. If we use the analysis to decide to eliminate an allocation, then this decision will have been made based on specialized code containing guards. In the event these guards fail, we must be able to undo

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Another somewhat sparse month. Fixed a couple of bugs and worked my though some of the backlog in my p5p mailbox. SUMMARY: 2:05 RT #133538 refaliasing does not work 1:00 RT #133687 codeblocks mis-parsed in runtime pattern 6:07 process p5p

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 34 tickets were reviewed, and 6 patches were applied. 7.90 #123638 review existing patch, work on fixes, testing #123638 review test results, debugging, research #123638 more research, work on a fix, debugging, testing #123638 debugging, partial fix

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 49 tickets were reviewed, and 6 patches were applied 2.18 #125760 re-test branch and apply to blead #125760 perldelta 11.90 #126706 get tests working, work on installer with install_name_tool #126706 re-work to use @rpath #126706 polish,

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. I've been almost entirely absent from perl stuff for the last couple of months due to doing other things and lack of enthusiasm. Hopefully things will start picking up. Did a little bit of work on a couple of tickets SUMMARY: 0:40

Jonathan writes: My performance work in October focused for the most part on escape analysis and scalar replacement. This work remains in a branch, however it has now reached the milestone of performing its first couple of real-world optimizations, eliminating short-lived boxes and wrapper objects across inline boundaries. I also started with some long-planned work on more aggressive optimization of lexical variables, such that they are stored as "locals" where

Jonathan writes: My main deliverable in September was a significant improvement to the performance of object construction and initialization. I wrote a blog post describing the ways in which this was achieved. I also improved the performance of array assignment, took on a tricky bug that stood in the way of merging a GC performance improvement, and took another small step with the work on escape analysis. 5:33 Lots of

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 34 tickets were reviewed, and 4 patches were applied 2.47 fatalize sysread/recv/syswrite/send on utf8 handles: fix warnings, croak tests, documentation updates, post patch to #125760 0.20 #126084 try to apply, issue already fixed, close ticket 1.58 #126706

My grant work in August focused on improving the performance of a number of very commonly used constructs in Perl 6 programs, of note array and hash access, box/unbox operations and various common operations on Int My work also uncovered a problem that could be best addressed with a small language design tweak, and I wrote up a proposal on that I also made various improvements to the optimization infrastructure.

Work in the latter part of July, falling under the current round of the grant, focused mostly on hunting down and fixing bugs. A memory leak bug involving the thread pool scheduler was fixed; it was only problematic in some programs so far, but would have become far more noticeable with the new 6.d await semantics. Others fixes addressed regressions arising from recent optimization work, although in most cases the

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. I didn't spend all that many hours during August on perl work. I spent most of my time looking at a bug related to restoring of captures within regex repeats. During the course of that, I took the opportunity to simplify and cleanup

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 44 tickets were reviewed, and 4 patches were applied. 1.23 #p5p discussion with khw on shared hash problem 4.73 #132158 testing, debugging, work on a fix, more testing #132158 consider other fixes, testing, comment with patches 1.60

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. I did very few hours last month. This was partly due to delays in getting my grant extended, and partly because I was busy with other things. SUMMARY: 2:00 RT #133352 Ancient Regex Regression 0:30 RT #133368 index optimisation in when

Jonathan Worthington has requested an extension of $10,000 for his Perl 6 Performance and Reliability Engineering grant. This will allow him to dedicate another 200 hours to this work. His previous work was successfully delivered as reported in the latest report. Jonathan writes: "A further grant extension will enable me to continue my work on Perl 6 performance and reliability. The 200 hours I just completed have seen both optimizations

This report describes what I have accomplished in the latest 200 hours of my Perl 6 Performance and Reliability Engineering grant. A new MoarVM specializer plugin mechanism The most significant new optimizations developed in this grant period center around a new mechanism for helping the MoarVM specializer, which optimizes and JIT-compiles hot code, to understand a wider range of Perl 6 constructs. I used this mechanism to speed up: Private

Dave Mitchell has requested an extension of $20,000 for his Maintaining Perl 5 grant. This will allow him to dedicate another 333 hours to this work. During this grant he sent regular reports to the p5p mailing list as well as providing monthly summary reports that have been published on this site, the most recent of which are linked below: June 2018 May 2018 April 2018 Before

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. I spent the last month mainly working on: blocking issues for the 5.28.0 release. BBC tickets ASAN-related tickets SUMMARY: 2:22 RT #133204 Integer overflow leading to buffer overflow 15:29 RT #133270 Blead Breaks CPAN: HMBRAND/DBD-CSV-0.53.tgz 5:03 RT #133271 Blead Breaks

Tony Cook has requested an extension of $20,000 for his Maintaining Perl 5 grant. This will allow him to dedicate another 400 hours to this work. During this grant he sent regular reports to the p5p mailing list as well as providing monthly summary reports that have been published on this site, the most recent of which are linked below: May 2018 April 2018 March 2018 Before

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 34 tickets were reviewed. 8.10 #122112 re-work an old solution #122112 testing and fail, think about other solutions #122112 work up a fix, testing, work on a regression test #122112 finish regression test, testing, polish, comment with

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. SUMMARY: 5:00 RT #132863 BBC LWP-Protocol-https-6.07 0:30 RT #133169 pack treats non hex-digits with the "H*" template 1:30 RT #133184 Threaded builds failing on Linux 4.16.5 or higher 2:00 RT #133194: regcomp: heap-buffer-overflow read 3:00 RT #133220 perl_parse

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. I spent the last month mainly working on blocking issues for the 5.28.0 release. SUMMARY: 4:54 File::Copy test failure under quadmath 5:00 RT #132863 BBC LWP-Protocol-https-6.07 0:46 RT #132955 USE_CPLUSPLUS build broken in 5.27 blead and all 5.26 stables

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 33 tickets were reviewed, and 6 patches were applied 1.09 #128627 try to reproduce, have basic problems with cygwin #128627 try to track down cygwin compiler issues 0.83 #131844 testing, push blead fix 0.40 #132876 re-test and apply

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. 3.25 #127743 fix MSVC debugging builds #127743 work on reducing Win32/gcc Storable warnings #127743 testing warning fixes 7.31 #130683 review the change and try to figure out what’s going wrong #130683 debugging #130683 debugging #130683

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. I spent the last month mainly doing two things: 1> fixing up Deparse.pm so that running the whole perl test suite through Deparse, i.e. ./TEST -deparse doesn't have any new failures. 2> going through the list of broken-in-blead top-1000 CPAN distributions to

This is a monthly report by Tony Cook on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. Approximately 24 tickets were reviewed, and 6 patches were applied 2.60 #125351 testing, sidetracked into unrelated failure, have reproduction problems, back to original testing, apply to blead #125351 look at minor re-work of patch, which apparently I’d already

This is a monthly report by Dave Mitchell on his grant under Perl 5 Core Maintenance Fund. We thank the TPF sponsors to make this grant possible. I have spent the last month mainly doing two things: Fixing various issues with overloading and the new multiconcat op. I decided that rather than continue adding more and more special-case handling to the existing code, I would handle the overloading in pp_multiconcat

This is the report from zefram on his Perl 5 grant under the Perl 5 Core Maintenance Fund for February 2018. We thank the TPF sponsors to make this grant possible. The hours that I have worked in 2018-02 pursuant to my TPF core maintenance grant are as follows. 10h47m Blead Breaks CPAN: MAROS/DateTime-Format-CLDR-1.19.tar.gz 8h52m review mail 3h08m COW bug in :encoding layer 2h45m Blead