Architectural inquiry: Design rationale behind serialized request handling for identical URLs

=?windows-1255?B?7Ong5fgg4fjg5e8=?= <[email protected]> Wed, 18 Feb 2026 10:59:33 +0000
Newsgroups gmane.comp.web.squid.devel
Message-ID <GV2PR07MB116014F74F71B2E6A1C58D119E46AA@GV2PR07MB11601.eurprd07.prod.outlook.com>
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Hello,



My name is Lior Brown, a research assistant from Ariel University, and cont=
ributer of squid-cache.


I am currently working on a research project involving request dispatching =
and peer selection within the Squid-cache core.

During my development, I have encountered several mechanisms and logic bloc=
ks within the source code that deliberately prevent or queue parallel HTTP =
requests for the same URL, effectively serializing them.

I would like to understand the fundamental design rationale behind these re=
strictions. Specifically:

Are these blocks in place due to specific architectural constraints (such a=
s memory management or Store Entry state transitions)?

Are there known side effects or risks I should be aware of if I attempt to =
implement parallel requesting for identical objects in a research environme=
nt?

I want to ensure I fully understand the system's design philosophy before p=
roceeding with any modifications.


Thank you for your time and insights.

best regards,




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; font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt;" class=
=3D"elementToProof">
<span style=3D"font-family: Ariel, serif; font-size: 15pt; color: rgb(36, 3=
6, 36);" class=3D"elementToProof">My name is Lior Brown, a research assista=
nt from Ariel University, and contributer of squid-cache.</span></p>
<div style=3D"direction: ltr; text-align: left; text-indent: 0px; margin: 0=
cm; font-family: Ariel, serif; font-size: 15pt; color: rgb(36, 36, 36);" cl=
ass=3D"elementToProof">
<br>
</div>
<pre style=3D"width: 50em;" class=3D"elementToProof" id=3D"comment_text_0">=
<div style=3D"direction: ltr; text-align: left; text-indent: 0px; white-spa=
ce: pre-wrap; font-family: Ariel, serif; font-size: 15pt; color: rgb(36, 36=
, 36);" class=3D"elementToProof">I am currently working on a research proje=
ct involving request dispatching and peer selection within the Squid-cache =
core.</div><div style=3D"direction: ltr; text-align: left; text-indent: 0px=
; white-space: normal; font-family: Ariel, serif; font-size: 20px; color: r=
gb(36, 36, 36);" class=3D"elementToProof"><br></div><div style=3D"direction=
: ltr; text-align: left; text-indent: 0px; font-family: Ariel, serif; font-=
size: 15pt; color: rgb(36, 36, 36);" class=3D"elementToProof"><span class=
=3D"elementToProof">During my development, I have encountered several mecha=
nisms and logic blocks within the source code that deliberately prevent or =
queue parallel HTTP requests for the same URL, effectively serializing them=
.=0A=
=0A=
I would like to understand the fundamental design rationale behind these re=
strictions. Specifically:=0A=
=0A=
Are these blocks in place due to specific architectural constraints (such a=
s memory management or Store Entry state transitions)?=0A=
=0A=
Are there known side effects or risks I should be aware of if I attempt to =
implement parallel requesting for identical objects in a research environme=
nt?=0A=
=0A=
I want to ensure I fully understand the system's design philosophy before p=
roceeding with any modifications.=0A=
=0A=
</span></div><div style=3D"direction: ltr; text-align: left; text-indent: 0=
px; font-family: Ariel, serif; font-size: 15pt; color: rgb(36, 36, 36);" cl=
ass=3D"elementToProof"><span class=3D"elementToProof">Thank you for your ti=
me and insights.</span></div></pre>
<div style=3D"direction: ltr; text-align: left; margin: 0cm; font-family: A=
riel, serif; font-size: 15pt; color: rgb(36, 36, 36);" class=3D"elementToPr=
oof">
best regards,</div>
</div>
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rif; font-size: 11pt; color: black;" class=3D"elementToProof">
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os, sans-serif; font-size: 12pt;" class=3D"elementToProof">
&nbsp;</p>
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