The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Far less active on blog on social media: some personal things that need to be done.

Posted by jpluimers on 2019/04/03

Some people already noticed me being far less active on social media including this blog.

This will continue for a while, as I am supporting two people that are very dear to me.

  • One needs to get some MRI scans very soon, with past results not being promising, so consequences not clear yet.
  • Another I am protecting from mental abuse by somebody close, something which is very hard to prove, but has very real consequences. Recognising the – initially very subtle – behavioral changes, and convincing other people up the supporting and medical tree they were indeed true and related, took several years, so I recon the recovery process will take long too.

Luckily, my blog queue has been filled with about 2 years of content, so that will run automatically.

Social media response from me will be on a “when I feel like it” base until further notice, focussing on things that give me energy and bring me joy.



Posted in About, Personal | Leave a Comment »

The biggest lie I tell myself is not about new years resolutions.

Posted by jpluimers on 2019/01/01

The biggest lie I tell myself is “I don’t need to write that down, I’ll remember it”

It’s likely older, but the oldest reference I could find was 2012 [WayBack].

So before I forget:

Happy New Year everyone!

With the above quote, it is no coincidence I started my blog even earlier (in 2009): it’s my off-line memory, way better readable than my hand-writing and indexed by various search engines.

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Posted in About, LifeHacker, Personal, Power User | Leave a Comment »

Useful settings for FastMM4 to tracking bottlenecks in multi-threaded memory allocation

Posted by jpluimers on 2019/05/23

Interesting thread that reminded me of the relatively new FastMM feature to track down lock contention and cope with it using release stacks:

[WayBack] I try use FastMM4 to tracking bottleneck in allocating memory. I was inspired by this Primož movie: When I… – Jacek Laskowski – Google+

The changes by Primož have added these two new conditional defines to the FastMM4 codebase:

These options are mutually exclusive.

This was the original post it got introduced in [WayBack] The Delphi Geek: Finding Memory Allocation Bottlenecks with FastMM4 and merged into the main repository.

FastMM introduction: [WayBack] The New Memory Manager In BDS 2006 – by Pierre le Riche.

It also taught me about [WayBack] RAMDisk – Software that Accelerates, Protects, Optimizes – Server Memory Products & Services – Dataram.

Primož stores his DCU files there: much faster than SSD, and far less wear on your SSD; see


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Posted in Conference Topics, Conferences, Delphi, Development, Event, FastMM, Software Development | Leave a Comment »

sql – How to Select Every Row Where Column Value is NOT Distinct – Stack Overflow

Posted by jpluimers on 2019/05/22

Since I always forget that IN and EXISTS have very different performance characteristics: [WayBack] sql – How to Select Every Row Where Column Value is NOT Distinct – Stack Overflow

Less slow

select emailaddress,customername from customers where emailaddress in
(select emailaddress from customers group by emailaddress having count(*) > 1)


select emailaddress,customername from Customers a where exists
(select emailaddress from customers c where a.customerName != c.customerName and a.EmailAddress = c.EmailAddress)


Posted in Database Development, Development, Software Development, SQL | Leave a Comment »

Insentricity :: Kermit on the JAIR 8080 ::

Posted by jpluimers on 2019/05/22

Cool: [WayBackInsentricity :: Kermit on the JAIR 8080 ::

Repository: [WayBackFozzTexx/Kermit-CPM: Columbia University’s Kermit for CP/M


Posted in Assembly Language, Development, History, Software Development | Leave a Comment »

web services – Accessing the original TWebRequest object in a Delphi SOAP Server – Stack Overflow

Posted by jpluimers on 2019/05/22

Thanks Ondrej Kelle for answering this:


function TTest.CallMe: string;
  WebDispatcher: IWebDispatcherAccess;
  Result := '';
  if Supports(GetSOAPWebModule, IWebDispatcherAccess, WebDispatcher) then
    Result := Format('You are calling me from: %s', [WebDispatcher.Request.RemoteIP]);

Source: [WayBack] web services – Accessing the original TWebRequest object in a Delphi SOAP Server – Stack Overflow


Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | Leave a Comment »

It was all Greek to me: Iota · golang/go

Posted by jpluimers on 2019/05/21

Context is king!

Being Dutch, my association with iota was the phrase “Ik snap er geen iota van” (English: “It’s all Greek to me”), basically indicating iota is extremely small, similar to [WayBack] Iota | Definition of Iota by Merriam-Webster:

1an infinitesimal amount jot  (did not show an iota of interest)
2the 9th letter of the Greek alphabet — see alphabet table

But the first time, I saw iota used in golang, I actually confused it with [WayBack] itoa – C++ Reference, because I am more than slightly wordblind.

So code like this was all Greek to me at first, not understanding the conversion from integer to ASCII**, and slightly later, not understanding iota to be extremely small either. Heck, its usage indicates it is small from infinitesimal:

const (
    _           = iota // ignore first value by assigning to blank identifier
    KB ByteSize = 1 << (10 * iota)

So it took me a bit of thought to realise that it actually had to mean something completely different, so I found

It makes me wonder why they named it like this.

Slightly related:


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Posted in C++, Development, Go (golang), Software Development | Leave a Comment »

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