How to Speed Up Your Website
17.03.2026

A Complete Guide to Optimizing Loading Speed

Website speed optimization is a set of technical improvements aimed at reducing server response time and ensuring fast content rendering in the user’s browser. High loading speed is critical for keeping visitors engaged, lowering your advertising cost per lead, and strengthening SEO. In 2026, site performance became an official Google ranking factor (Core Web Vitals), directly influencing search visibility in Czechia and across the EU.


Why Speed Is the Foundation of Your Marketing

For business owners, loading time is measured not in seconds — but in money. Studies show that even a one-second delay can reduce conversions by 7%. If your landing page takes longer than three seconds to load, more than half of mobile users will leave without ever seeing your offer.

Fast loading directly impacts:
  • User behavior: Bounce Rate decreases.
  • Advertising performance: You pay for the click, but if the site loads slowly, the user leaves before analytics can track the visit.
  • SEO ranking: Google prioritizes technically optimized websites, especially in mobile results.

Key Stages of Website Acceleration: From Server to Content

1. High-quality hosting and backend configuration
Speed starts where your website “lives.” For European businesses, we recommend hosting in Czechia or Germany to minimize the physical distance between the server and the user.

  • HTTP/3: The latest protocol version significantly accelerates data transfer.
  • PHP version: Updating to the most recent version (8.x) can speed up page generation by 20–30%.

2. Frontend optimization (what the browser processes)
Even a powerful server can’t compensate for heavy or unoptimized code.

  • Minification: Remove unnecessary spaces and comments in CSS and JavaScript.
  • Gzip or Brotli compression: Transfers files in compressed form, reducing their size.
  • Caching: Configure browser caching to ensure instant loading on repeated visits.

3. Optimizing images and media
Images often make up 80% of total page weight.

  • Switch to WebP/AVIF: Modern formats are significantly lighter than their predecessors.
  • Lazy Loading: Images below the fold load only when the user scrolls, improving initial rendering speed.

4. Optimization for complex systems
If you’re running an online store or a large multi-page website, pay special attention to your database and third-party scripts (chat widgets, social media widgets, analytics). These elements often block the rendering of the main content.

How We Approach Performance at iuntsevich.cz

We don’t optimize just to “turn everything green” in Google PageSpeed Insights. Our goal is to make the site genuinely fast for real users.

  • Clean code: When building template-based websites, we remove unnecessary elements commonly found in pre-made themes.
  • Adaptive loading: We prioritize critical content (LCP) to make the first screen appear instantly.
  • Local setup: For Czech-based clients, we optimize for local hosting providers and configure CDN solutions for companies targeting the entire EU.
  • Post-launch monitoring: Speed isn’t a one-time fix. We teach clients how to upload content properly so the website remains fast over time.

Is Your Website Slower Than It Should Be?

A slow website drains your marketing budget. We can identify performance bottlenecks, optimize images, and fine-tune your server to make your site fly.

Request a Technical Audit & Website Speed Optimization

Author: Valentin iuntsevich ( linkedin )
Founder of a marketing agency iuntsevich.cz
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Ideally, the main content (LCP) should load in under 2.5 seconds. Anything above 3 seconds is considered slow.

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Royaldi
[ SMM Management ] [ Meta Ads Advertising ] [ Times Square Advertising ]
2024
Flames
[ Website ] [ SEO ] [ Menu ] [ Banners ] [ Meta Ads Advertising ]
2022-25
wowflow
[ Meta Ads Advertising ] [ Banners ]
2025
bagellounge
[ SMM Management ] [ Menu ] [ Design ]
2024
[ Business cards ]
2024
iuntsevich
5ytcvetok
[ SMM Management ] [ Website ] [ Design ] [ SEO ]
2024
sure
[ SMM Management ] [ Website ] [ SEO ] [ Copywriting ]
2023
acidum
[ Website ]
2024
Coffee Factory
[ Website Redesign ]
2022
present perfect
[ SMM Management ]
2022
[ Logo ] [ Website ] [ SEO ] [ Design ]
2022
top travel company
By izzi Sisters
[ Banners ] [ Meta Ads Advertising ]
2022
plan event agency
[ Website Redesign ] [ SEO ]
2023
Zapomni
[ SMM Management ] [ Website ] [ SEO ]
2023
Amber cloud
[ Logo ] [ Design ]
2017
visual studio
[ Logo ] [ Website ] [ SEO ] [ Business cards ]
2023
Street Vape
[ Business cards ]
2020
feoh cosmetic
[ Online Store ]
2022
portofino
[ Logo ] [ Website ] [ SEO ] [ Menu ]
2023
[ 24/24 ]
stand up prague
[ Banners ] [ Meta Ads Advertising ]
2022
Some cases are unavailable for public viewing due to confidentiality agreements.
Barliner
[ Google Ads Advertising ] [ Banners ]
2024-25
google ads Advertising
Shows:
Advertising budget:
Conversion cost:
557 000
28 600
4 750 €
~ 1.04 €
Clicks:
KINȮE WORLD
[ Website ] [ Meta Ads Advertising ]
2025
Vector Industrial
[ Website ]
2025
Prague Profi Group
[ Website ] [ Google Ads Advertising ] [ Banners ]
2025
[ 8/8 ]
Some cases are unavailable for public viewing due to confidentiality agreements.
[ Banners ] [ Meta Ads Advertising ]
2022
stand up prague
meta ads Advertising
Coverage:
Advertising budget:
Price for coverage of 1000 users:
337 800
543 000
315 €
~ 0.91€
Shows:
[ Banners ] [ Meta Ads Advertising ]
2022
By izzi Sisters
meta ads Advertising
Coverage:
Advertising budget:
Price for coverage of 1000 users:
1 033 400
1 643 800
354 €
~ 0.28 €
Shows:
Royaldi
[ SMM Management ] [ Meta Ads Advertising ] [ Times Square Advertising ]
2024
Coverage:
Advertising budget:
Price for coverage of 1000 users:
2 284 600
3 850 900
2 158 €
~ 0.96 €
Shows:
meta ads Advertising
Flames
[ Website ] [ SEO ] [ Menu ] [ Banners ] [ Meta Ads Advertising ]
2022-25
Coverage:
Advertising budget:
Price for coverage of 1000 users:
341 100
420 000
400 €
~ 1.15 €
Shows:
meta ads Advertising
Barliner
[ Google Ads Advertising ] [ Banners ]
2024-25
google ads Advertising
wowflow
[ Meta Ads Advertising ] [ Banners ]
2025
Coverage:
Advertising budget:
Price for coverage of 1000 users:
99 200
240 700
400 €
~ 4 €
Shows:
Shows:
Advertising budget:
Conversion cost:
557 000
28 600
4 750 €
~ 1.04 €
Clicks:
meta ads Advertising
Prague Profi Group
[ Google Ads Advertising ] [ Banners ] [ Website ]
2025
Shows:
Advertising budget:
CPC:
84000
1 210
250 €
0,21 €
Clicks:
google ads Реклама
KINȮE WORLD
[ Meta Ads Advertising ] [ Website ]
2025
Dosah:
Advertising budget:
Price for coverage of 1000 users:
749 797
1 460 428
968 €
~ 0,66 €
Shows:
meta ads Реклама
plan event agency
[ Website Redesign ] [ SEO ]
2023
sure
[ SMM Management ] [ Website ] [ SEO ] [ Copywriting ]
2024
5ytcvetok
[ SMM Management ] [ Website ] [ Design ] [ SEO ]
2024
acidum
[ Website ]
2024
Flames
[ Website ] [ SEO ] [ Menu ] [ Banners ] [ Meta Ads Advertising ]
2022-25
[ SMM Management ] [ Website ] [ SEO ]
2023
Zapomni
portofino
[ Logo ] [ Website ] [ SEO ] [ Menu ]
2023
top travel company
[ Logo ] [ Website ] [ SEO ] [ Design ]
2022
visual studio
[ Logo ] [ Website ] [ SEO ] [ Business cards ]
2023
feoh cosmetic
[ Online Store ]
2022
Coffee Factory
[ Website Redesign ]
2022
[ 14/14 ]
Some cases are unavailable for public viewing due to confidentiality agreements.
KINȮE WORLD
[ Website ] [ Meta Ads Advertising ]
2025
Vector Industrial
[ Website ]
2025
Prague Profi Group
[ Website ] [ Google Ads Advertising ] [ Banners ]
2025
Royaldi
[ SMM Management ] [ Meta Ads Advertising ] [ Times Square Advertising ]
2024
bagellounge
[ SMM Management ] [ Menu ] [ Design ]
2024
5ytcvetok
[ SMM Management ] [ Website ] [ Design ] [ SEO ]
2024
sure
[ SMM Management ] [ Website ] [ SEO ] [ Copywriting ]
2023
[ SMM Management ] [ Website ] [ SEO ]
2023
Zapomni
[ SMM Management ]
2022
present perfect
[ 6/6 ]
Some cases are unavailable for public viewing due to confidentiality agreements.

bagellounge
[ SMM Management ] [ Menu ] [ Design ]
2024
Barliner
[ Google Ads Advertising ] [ Banners ]
2024-25
Flames
[ Website ] [ SEO ] [ Menu ] [ Banners ] [ Meta Ads Advertising ]
2022-25
wowflow
[ Meta Ads Advertising ] [ Banners ]
2025
iuntsevich
[ Business cards ]
2024
[ SMM Management ] [ Website ] [ Design ] [ SEO ]
2024
5ytcvetok
portofino
[ Logo ] [ Website ] [ SEO ] [ Menu ]
2023
top travel company
[ Logo ] [ Website ] [ SEO ] [ Design ]
2022
visual studio
[ Logo ] [ Website ] [ SEO ] [ Business cards ]
2023
By izzi Sisters
[ Banners ] [ Meta Ads Advertising ]
2022
stand up prague
[ Banners ] [ Meta Ads Advertising ]
2022
Street Vape
[ Business cards ]
2020
Amber cloud
[ Logo ] [ Design ]
2017
[ 13/13 ]
Some cases are unavailable for public viewing due to confidentiality agreements.
sure
[ SMM Management ] [ Website ] [ SEO ] [ Copywriting ]
2024
plan event agency
[ Website Redesign ] [ SEO ]
2024
5ytcvetok
[ SMM Management ] [ Website ] [ Design ] [ SEO ]
2024
portofino
[ Logo ] [ Website ] [ SEO ] [ Menu ]
2023
top travel company
[ Logo ] [ Website ] [ SEO ] [ Design ]
2022
[ Logo ] [ Website ] [ SEO ] [ Business cards ]
2023
visual studio
Zapomni
[ SMM Management ] [ Website ] [ SEO ]
2023
Flames
[ Website ] [ SEO ] [ Menu ] [ Banners ] [ Meta Ads Advertising ]
2022-25
[ 8/8 ]
Some cases are unavailable for public viewing due to confidentiality agreements.
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❝ We always approach projects with maximum dedication: not only fulfilling contractual obligations, but also ensuring that the result truly benefits the business. ❞
«iuntsevich.cz»
❝ We always approach projects with maximum dedication: not only fulfilling contractual obligations, but also ensuring that the result truly benefits the business. ❞
5/5
google maps reviews
«iuntsevich.cz»
20/05/2022
Dilshad Ruzmetov
❝ They created several stylish and efficient websites for us.

The work was done professionally and on time. I would especially like to highlight the team’s responsiveness and professionalism. Thank you for a successful partnership! ❞
«Flames»
20/05/2022
Dilshad Ruzmetov
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«Flames»
24/07/2023
Ivan Brova
❝ A professional team that supported us at every stage — from concept to design — while taking all our wishes into account.

Thanks to their support, we quickly received a stylish and user-friendly website. ❞

«TopTravelCompany»
Ivan Brova
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«TopTravelCompany»
24/07/2023
22/01/2024
Alexandr Logovik
❝ I would like to express my gratitude to the iuntsevich team for our productive collaboration!
Together, we developed a website for my project, and the result went beyond expectations. The team perfectly captured my idea and delivered a design that was precise, stylish, and tasteful. ❞
«Acidum»
22/01/2024
Alexandr Logovik
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«Acidum»
24/06/2024
Alsu Latypova
❝ I’m impressed not only with the final result but also with the whole process of working with iuntsevich.cz

The team instantly understood our requests and got everything right from the very first attempt. ❞
«5ytcvetok»
24/06/2024
Alsu Latypova
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«5ytcvetok»
09/01/2025
Alfredo Tizanni
❝ These guys are simply the best!
Everything was delivered right on time!

We ordered the design of three menus for our restaurant, and the result exceeded all expectations. The design turned out stylish, user-friendly for our guests, and fully aligned with our brand. ❞
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Alfredo Tizanni
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09/01/2025

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