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Unused Javascript: How to Solve It

Unused JavaScript is script code that is downloaded, and often parsed and compiled, but whose functions are never executed during the actual page session, commonly from shipping an entire library or framework bundle when only a small subset of its functionality is used on a given page. This is typically caused by a lack of code splitting or tree shaking in the build process, so route-specific or component-specific code all gets bundled into one shared file loaded on every page. Beyond the wasted download bytes, the browser still spends CPU time parsing and compiling that dead code, which delays Time to Interactive and can contribute to a poor Total Blocking Time score.

Unused JavaScript: How to Solve It

Unused JavaScript is script code that is downloaded, and often parsed and compiled, but whose functions are never executed during the actual page session, commonly from shipping an entire library or framework bundle when only a small subset of its functionality is used on a given page. This is typically caused by a lack of code splitting or tree shaking in the build process, so route-specific or component-specific code all gets bundled into one shared file loaded on every page. Beyond the wasted download bytes, the browser still spends CPU time parsing and compiling that dead code, which delays Time to Interactive and can contribute to a poor Total Blocking Time score.

Why this happens

Unused JavaScript is typically the result of a build process without code splitting or tree shaking, so an entire library or framework bundle ships to every page even when a given page only needs a small subset of its functionality. This is common when a single shared bundle serves the whole site rather than route-specific or component-specific bundles generated per page.

What it costs you

Beyond the wasted download bytes, the browser still spends real CPU time parsing and compiling code that will never execute during that page session, which delays Time to Interactive and contributes directly to a poor Total Blocking Time score. On lower-powered mobile devices, that parse and compile tax is disproportionately larger, making the page feel sluggish even after the visible content has painted.
How it works

How we resolve it

01

Diagnose

We audit your current setup and identify the root cause.

02

Fix

We implement targeted corrections using proven methods.

03

Verify

We confirm the issue is resolved and monitor for recurrence.

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What clients say

Results from businesses that trust us.

Excellent on Google ★★★★★ 5.0 out of 5 · 14 reviews
★★★★★

Andre and Arising Media are incredible at what they do and they have more than doubled our business. They go above and beyond to make sure that we succeed.

Brian Sirois
★★★★★

Absolutely loved working with the Arising Media team. They are extremely helpful in explaining any process and answering questions thoughtfully. This is an awesome team that provides quality and expertise.

Venus Vega
★★★★★

We have been working with Arising and Andre for years and their attentiveness to us is unmatched. Insightful direction on strategy and execution is perfect and has helped our business grow!!

Lana Camera
★★★★★

Andre and his team at Arising Media are the most professional team I have come across in terms of Google Search with SEO and SEM. They are extremely knowledgeable and know how to execute a successful plan that converts to leads and revenue growth.

Jamie Taylor
★★★★★

Could not be happier with Andre and his team's experience, professionalism, and support. They are so detail oriented. I could not be more grateful for all the time they took to get to know my brand so they could envision what I could not for myself.

Lily Ignatowski
★★★★★

I've worked with Andre on and off for almost four years. He's kind, courteous, and professional. His work is always top quality and he's always available to answer any questions I might have.

Charlie Serabian
★★★★★

I am very happy with my webpage. Andre & his crew are very technologically up to date, creative & talented. He goes above & beyond the call of duty. Good quality workmanship, great value, very professional & responsive.

Anne Lahr
★★★★★

Arising media is the best company to quickly develop a website or design a menu board.

Altin Muhaxheri
★★★★★

Very responsive throughout entire process. Good experience.

Sean R
★★★★★

Not only were they able to give me new digital boards for in-store but did a complete new website for me which is very easy to navigate. Very professional and hands on.

erolind simnica
★★★★★

Andre and his team are amazing and keep the calls coming in. Keep up the good work.

Chuck Haug
★★★★★

Best digital signage I've ever had! Awesome customer service! I love my website!

Marissa M
★★★★★

High recommend Arising Media to anyone looking for digital solutions.

Jamie Taylor
★★★★★

Andre and Arising Media are incredible at what they do and they have more than doubled our business. They go above and beyond to make sure that we succeed.

Brian Sirois
★★★★★

Absolutely loved working with the Arising Media team. They are extremely helpful in explaining any process and answering questions thoughtfully. This is an awesome team that provides quality and expertise.

Venus Vega
★★★★★

We have been working with Arising and Andre for years and their attentiveness to us is unmatched. Insightful direction on strategy and execution is perfect and has helped our business grow!!

Lana Camera
★★★★★

Andre and his team at Arising Media are the most professional team I have come across in terms of Google Search with SEO and SEM. They are extremely knowledgeable and know how to execute a successful plan that converts to leads and revenue growth.

Jamie Taylor
★★★★★

Could not be happier with Andre and his team's experience, professionalism, and support. They are so detail oriented. I could not be more grateful for all the time they took to get to know my brand so they could envision what I could not for myself.

Lily Ignatowski
★★★★★

I've worked with Andre on and off for almost four years. He's kind, courteous, and professional. His work is always top quality and he's always available to answer any questions I might have.

Charlie Serabian
★★★★★

I am very happy with my webpage. Andre & his crew are very technologically up to date, creative & talented. He goes above & beyond the call of duty. Good quality workmanship, great value, very professional & responsive.

Anne Lahr
★★★★★

Arising media is the best company to quickly develop a website or design a menu board.

Altin Muhaxheri
★★★★★

Very responsive throughout entire process. Good experience.

Sean R
★★★★★

Not only were they able to give me new digital boards for in-store but did a complete new website for me which is very easy to navigate. Very professional and hands on.

erolind simnica
★★★★★

Andre and his team are amazing and keep the calls coming in. Keep up the good work.

Chuck Haug
★★★★★

Best digital signage I've ever had! Awesome customer service! I love my website!

Marissa M
★★★★★

High recommend Arising Media to anyone looking for digital solutions.

Jamie Taylor

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