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  5 Things that kill your IW app performance
Posted by: Alexandre Machado - 02-07-2024, 02:59 AM - Forum: IntraWeb General Discussion - Replies (10)

Another post to help you guys to get the best possible performance when deploying an IntraWeb application:

https://www.atozed.com/2024/02/5-things-...plication/

Enjoy  Big Grin

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  IW iw15.5.6 - nonSSL lock message when starting app as exe
Posted by: rudyPos - 02-06-2024, 03:41 PM - Forum: IntraWeb General Discussion - Replies (1)

I will go back to 15.5.5 to check,
Here is the message I get, but the application still works for HTTP:
"SSLOptions.NonSSLRequest(is locked. Suggestion: Set in ServerController OnConfig event instead."

I CAN SEE it did not get this error in 15.4.1

Please advise
TIA


IW 15.5.5 shows same error message...

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  Stand alone application vs Windows service (Priority support)
Posted by: valmeras - 01-31-2024, 06:56 PM - Forum: IntraWeb General Discussion - Replies (2)

Atozed recommend to install Intraweb applications as a Windows service instead of deploying it as a Stand Alone application.
So, I would like to know if there is a performance difference between the 2 types of deployments?

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  Google LibPhonenumber import issues
Posted by: cpstevenc - 01-31-2024, 06:13 PM - Forum: CrossTalk General Discussion - No Replies

Greetings.. using latest CrossTalk demo and Delphi 11.3 for win32


DCL: 2.0.32
NET: 533320
Middle (x86): 2.0.32
Right: 2.0.32
UI: 2.0.32

I am messing around with Google LibPhonenumber for C#    ( For life of me can't get CPP version to compile so gave up.  )

Originally I found this @ landrix/LibPhonenumber-for-Delphi: Delphi-wrapper for the .NET port of Google's libphonenumber for parsing, formatting and validating international phone numbers. (github.com)

And for most part it works.  Looks like he wrote a middle man DLL type deal to go between Delphi and the .NET DLL ...  but only covers 2 calls of the over all library.

Limited, but does work.

Then I remembered CrossTalk and gave it A whirl.

It created a NET.PhoneNumbers.pas file

But it is missing a few things....?

Unreferenced <--- not sure?

Code:
  PhoneNumberUtil = class(TCTBaseObject)
  private
    class function ValidStartCharPatternRead: Unreferenced; static; /// <--- lots of references in the source import for "Unreferenced"
    class procedure ValidStartCharPatternWrite(const aValue: Unreferenced); static;
  protected
    class function CTFullTypeName: string; override;
  public const

..

..


RegexOptions <-- only used once... but I think? I just need to import some other .NET library to include this regex engine maybe?


Code:
  PhoneRegex = class(TCTBaseObject)
  private
  protected
    class function CTFullTypeName: string; override;
  public
    constructor Create(const aPattern: string); reintroduce; overload;
    constructor Create(const aPattern: string; const aOptions: RegexOptions); reintroduce; overload;  <--- only reference
    function IsMatch(const aValue: string): Boolean; overload;


TCTObject <--- Atozed.CrossTalk.BaseObject has no mention of this?
TypeNET  <--- this i get as Type is a reserved word... so it must create TypeNet ... but i figure this is to be something else really in the end?

Pretty much every object has this "Equals" call that references TCTObject the and GetType:TypeNet;


Code:
  AreaCodeMapStorageStrategy = class(TCTBaseObject)
  private
  protected
    class function CTFullTypeName: string; override;
  public
    function GetPrefix(const aIndex: Int32): Int32; overload;
    function GetStorageSize: Int32; overload;
    function GetDescription(const aIndex: Int32): string; overload;
    function GetNumOfEntries: Int32; overload;
    function ToString: string; reintroduce; overload;
    function Equals(const aObj: TCTObject): Boolean; reintroduce; overload; <--------- every TCTBaseObject seems to have this
    function GetHashCode: Int32; reintroduce; overload;
    function GetType: TypeNET; overload; <--------- every TCTBaseObject seems to have this
  end;

For now I just did this to get by

Code:
  RegexOptions = class
  end;

  Unreferenced = class
  end;

  TCTObject = class
  end;

  TypeNET = class
  end;

And it compiles...

And it runs....

Code:
Uses NET.PhoneNumbers, ...
..
..

var
  p: string;
  r: boolean;
begin
  Memo1.Clear;

  p := '18594091234';
  r := PhoneNumberUtil.IsViablePhoneNumber(p);
  Memo1.Lines.Add(format('phone %s is %s', [p, BoolToStr(r)]));  // -1 returned = true

  p := 'dumbstuff';
  r := PhoneNumberUtil.IsViablePhoneNumber(p);
  Memo1.Lines.Add(format('phone %s is %s', [p, BoolToStr(r )])); // 0 returned = false
end;

I imported a small DLL I wrote in C# ... Add/Subtract kind of deal. Just to play with.

And it too created references to TCTObject the and GetType:TypeNet;


This the win32 .NET DLL I imported

https://github.com/landrix/LibPhonenumbe...umbers.dll

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  whats about Grids ?
Posted by: joergb - 01-31-2024, 03:45 PM - Forum: IntraWeb General Discussion - No Replies

in normaly VLC app's I use a lot of Grids. Its simple to handle and the user gets a quick overview about his data.

But  it seems , in Intraweb , they are treat like a bad thing.

I found no way to gets a 'Cursor' in TIWGrid to show the Current Row . I don't get a event , if a Row or a Col is clicked and so on.
So I use TIWListbox with a non proportinal font .

In dbGrid I found here in Forum a way to use it , and show the current record. I think, its a workaround using colums and reread the table by every change of that colums. But it works for small tables.

Did I miss something or accidently ignore it ? Or exist a better component ie to show a couple of data, and let the user choose one of them to work with ?

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  TIdFTPServer slow-ish
Posted by: OzAWebb - 01-29-2024, 12:45 PM - Forum: Indy General Discussion - Replies (2)

G'day from Downunder,

Indy10, as supplied with Delphi 2006 (sorry, can't recall whether I've updated it).

Using IdFTPServer to receive files from a third-party hardware device.
Device sends files in batches of 200 or more of small 30k-ish files.
Device establishes a new FTP connection - login etc - for every file and disconnects after each, then immediately logs in for the next file.
Device uses passive PASV data transfer.

Sample data capture from Wireshark:

No. Time    Source          Destination    Prt Len Info
18  49:56.2 192.168.11.102  192.168.11.100  FTP 60  Request: PASV
19  49:56.2 192.168.11.100  192.168.11.102  FTP 104 Response: 227 Entering Passive Mode (192,168,11,100,0,20).
20  49:56.2 192.168.11.102  192.168.11.100  TCP 60  49250  >  20 [SYN] Seq=0 Win=4096 Len=0 MSS=1024
21  49:56.2 192.168.11.100  192.168.11.102  TCP 58  20  >  49250 [SYN, ACK] Seq=0 Ack=1 Win=64512 Len=0 MSS=1460
22  49:56.2 192.168.11.102  192.168.11.100  TCP 60  49250  >  20 [ACK] Seq=1 Ack=1 Win=4096 Len=0
23  49:56.2 192.168.11.102  192.168.11.100  FTP 103 Request: STOR 20240919_111530.jpg.tmp
24  49:56.2 192.168.11.100  192.168.11.102  FTP 108 Response: 150 File status okay; about to open data connection.
25  49:56.2 192.168.11.102  192.168.11.100  FTP-DATA    1078    FTP Data: 1024 bytes (PASV) (STOR 20240919_111530.jpg.tmp)
    :          :
68  49:56.3 192.168.11.102  192.168.11.100  FTP-DATA    1078    FTP Data: 1024 bytes (PASV) (STOR 20240919_111530.jpg.tmp)
69  49:56.3 192.168.11.100  192.168.11.102  TCP 54  20  >  49250 [ACK] Seq=1 Ack=30721 Win=64512 Len=0
70  49:56.3 192.168.11.102  192.168.11.100  FTP-DATA    715 FTP Data: 661 bytes (PASV) (STOR 20240919_111530.jpg.tmp)
71  49:56.3 192.168.11.102  192.168.11.100  TCP 60  49250  >  20 [FIN, ACK] Seq=31382 Ack=1 Win=4096 Len=0
72  49:56.3 192.168.11.100  192.168.11.102  TCP 54  20  >  49250 [ACK] Seq=1 Ack=31383 Win=63851 Len=0
73  49:56.3 192.168.11.100  192.168.11.102  TCP 54  20  >  49250 [FIN, ACK] Seq=1 Ack=31383 Win=63851 Len=0
74  49:56.3 192.168.11.102  192.168.11.100  TCP 60  49250  >  20 [ACK] Seq=31383 Ack=2 Win=4095 Len=0
75  49:56.6 192.168.11.100  192.168.11.102  TCP 138 [TCP Retransmission] 21  >  49249 [PSH, ACK] Seq=245 Ack=159 Win=64354 Len=84
76  49:56.6 192.168.11.102  192.168.11.100  TCP 60  [TCP ACKed unseen segment] 49249  >  21 [ACK] Seq=159 Ack=329 Win=3768 Len=0
77  49:56.6 192.168.11.102  192.168.11.100  FTP 103 Request: RNFR 20240919_111530.jpg.tmp
78  49:56.6 192.168.11.100  192.168.11.102  FTP 110 Response: 350 Requested file action pending further information.
79  49:56.6 192.168.11.102  192.168.11.100  FTP 99  [TCP ACKed unseen segment] Request: RNTO 20240919_111530.jpg
80  49:56.6 192.168.11.100  192.168.11.102  FTP 62  Response: 250 Ok
81  49:56.6 192.168.11.102  192.168.11.100  FTP 60  [TCP ACKed unseen segment] Request: QUIT
82  49:56.6 192.168.11.100  192.168.11.102  FTP 68  Response: 221 Goodbye.


(Bulk of data transfer removed for brevity between lines 25 & 68)

The problem is the delay between lines 74 & 75 - might only be 300ms, but that adds up over 200+ files.
(Using Filezilla for the FTP server is about 3 times faster than using Indy.)

I initially noticed that after the final data packet (line 70 above) Indy wasn't responding with the expected 226 'Closing data connection.' , so I thought (I'm a FTP novice) that perhaps the device wasn't closing the data connection. So I hacked the ReadFromStream procedure in TIdFTPServer.DoDataChannelOperation() to exit if the packet size was under 1k. That resulted in Indy providing the 226 response:

74  07:48:43.986  192.168.11.102   192.168.11.100   FTP-DATA 940 FTP Data: 886 bytes (PASV) (STOR 20240129_074854.jpg.tmp)
75  07:48:43.986  192.168.11.102   192.168.11.100   TCP 60 49158 > 50499 [FIN, ACK] Seq=32631 Ack=1 Win=4096 Len=0
76  07:48:43.986  192.168.11.100   192.168.11.102   TCP 54 50499 > 49158 [ACK] Seq=1 Ack=32632 Win=64512 Len=0
77  07:48:43.990  192.168.11.100   192.168.11.102   TCP 54 50499 > 49158 [FIN, ACK] Seq=1 Ack=32632 Win=64512 Len=0
78  07:48:43.991  192.168.11.102   192.168.11.100   TCP 60 49158 > 50499 [ACK] Seq=32632 Ack=2 Win=4095 Len=0
79  07:48:44.160  192.168.11.100   192.168.11.102   TCP 108 [TCP Retransmission] 21 ? 49157 [PSH, ACK] Seq=247 Ack=159 Win=64354 Len=54
80  07:48:44.161  192.168.11.102   192.168.11.100   TCP 60 49157 > 21 [ACK] Seq=159 Ack=301 Win=3796 Len=0
81  07:48:44.445  192.168.11.100   192.168.11.102   FTP 84 Response: 226 Closing data connection.
82  07:48:44.445  192.168.11.102   192.168.11.100   FTP 103 Request: RNFR 20240129_074854.jpg.tmp



(Captures were taken on different dates so don't correspond exactly.)

But there's still a delay before the 226 response (line 81).

After a quick Google of 'FIN ACK' it seems that the device is to blame, as it shouldn't ?? be including the ACK as it has nothing to acknowledge.
So I'm thinking the unexpected ACK is throwing Indy off.

(For reference Filezilla's handling looks like so:
68  12:35:34.094 192.168.11.102  192.168.11.100  FTP-DATA    938 FTP Data: 884 bytes (PASV) (STOR 20240919_110108.jpg.tmp)
69  12:35:34.094 192.168.11.102  192.168.11.100  TCP 60  49206 > 50507 [FIN, ACK] Seq=30581 Ack=1 Win=4096 Len=0
70  12:35:34.094 192.168.11.100  192.168.11.102  TCP 54  50507 > 49206 [ACK] Seq=1 Ack=30582 Win=64512 Len=0
71  12:35:34.094 192.168.11.100  192.168.11.102  TCP 54  50507 > 49206 [FIN, ACK] Seq=1 Ack=30582 Win=64512 Len=0
72  12:35:34.094 192.168.11.100  192.168.11.102  FTP 80  Response: 226 Operation successful
73  12:35:34.095 192.168.11.102  192.168.11.100  TCP 60  49206 > 50507 [ACK] Seq=30582 Ack=2 Win=4095 Len=0
74  12:35:34.095 192.168.11.102  192.168.11.100  TCP 60  49205 > 21 [ACK] Seq=159 Ack=364 Win=3733 Len=0
75  12:35:34.095 192.168.11.102  192.168.11.100  FTP 103 Request: RNFR 20240919_110108.jpg.tmp

No delay, no TCP retransmission.)

Went hunting for Indy's FIN (and ACK) handling and came up empty (except for IdRawHeaders.pas and IdRawFunctions.pas which appear to not be referenced). Bit more Googling seems to show they are handled at a lower level than Indy. (But if that's the case how come Filezilla works???)

I welcome any and all suggestions as to how to resolve this, including any solutions that should have been blazingly obvious!
(But excluding 'Just use Filezilla' as we're currently doing precisely that, but it'd be nicer to use Indy integrated with our code.)

Thanks in advance for any replies,

Adam.

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  IntraWeb 15.5.6 is out!
Posted by: Alexandre Machado - 01-28-2024, 05:55 AM - Forum: IntraWeb General Discussion - Replies (1)

Hi guys,

there is a new IntraWeb update available containing a couple of urgent bug fixes: 

https://www.atozed.com/2024/01/intraweb-15-5-6/

Enjoy!  Big Grin

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  IntraWeb versus ASP.NET: A performance comparison
Posted by: Alexandre Machado - 01-28-2024, 12:21 AM - Forum: IntraWeb General Discussion - Replies (5)

I believe you guys will like this new comparison that I've just published (except if you are not using IntraWeb, of course)  Big Grin

https://www.atozed.com/2024/01/intraweb-versus-aspnet/

Bottom line is:

IntraWeb throughput is 5x higher
IntraWeb memory consumption is 22x lower

The numbers speak for themselves. The code and the test plan are both published and the link can be found in the article.

Enjoy!

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  recent breaking change
Posted by: iwuser - 01-24-2024, 08:02 PM - Forum: IntraWeb General Discussion - Replies (3)

Just noticed that with the latest IW versions, in the spot in my code where I need to bump up session timeout mid-flight, it no longer works:

"SessionOptions.SessionTimeout is locked. Suggestion: Set in ServerController OnConfig event instead."

This suggestion does not work for me, because I typically set the timeout small up-front, in ServerController OnConfig event, but then later in this case I need to prompt the user and so I need to increase it. Or I could do it the other way around: make it long up-front and then shorten it later in all other cases.

Can it be restored back to how it was before, please?

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  IntraWeb Performance x Memory Managers
Posted by: Alexandre Machado - 01-24-2024, 04:54 AM - Forum: IntraWeb General Discussion - Replies (4)

Hi guys,

here is a new article that I've just published in our blog:

https://www.atozed.com/2024/01/capacity-...-managers/

There is some great information there and I hope you guys enjoy it  Big Grin

Cheers

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