HTML Streaming, Improve Web Performance with SSR
Posted: Thu Jul 10, 2025 4:15 am
In web development, there's a common frustration: we create spectacular interfaces that work like lightning in our local environment... but when we publish them, something happens that we can't control like it does in the local environment. Loading times drag, interaction is delayed, and users abandon their work before the website can react.
SSR, CSR, SSG or ISR? This is how the modern web is rendered
In today's web development, how content is delivered to the user matters as much as the content itself.
ITDO Blog - Web, App, and Marketing Development Agency in Barcelona
The cause isn't usually your JavaScript or the user's connection. The problem is probably server- side , but sometimes it's the rendering architecture .
With this scenario in mind, I want to introduce you to c level contact list an underutilized but extremely powerful technique: server-side HTML streaming . With it, you can significantly speed up the initial load without rewriting your entire application or changing frameworks.
Why do modern apps still load slowly?
Most current web applications use frameworks such as React, Vue or Angular, and by default implement client -side rendering (CSR ).
What does this mean?
The browser requests the page.
The server responds with empty (or almost empty) HTML.
The browser starts downloading a large package of JavaScript.
Once downloaded, run it.
JavaScript makes calls to APIs to obtain the data.
Finally, the UI is built and displayed to the user.
This flow is sequential . Each step depends on the previous one. And that's what causes the famous "blank screen" that lasts for several seconds, especially on slow connections or low-power devices.
SSR, CSR, SSG or ISR? This is how the modern web is rendered
In today's web development, how content is delivered to the user matters as much as the content itself.
ITDO Blog - Web, App, and Marketing Development Agency in Barcelona
The cause isn't usually your JavaScript or the user's connection. The problem is probably server- side , but sometimes it's the rendering architecture .
With this scenario in mind, I want to introduce you to c level contact list an underutilized but extremely powerful technique: server-side HTML streaming . With it, you can significantly speed up the initial load without rewriting your entire application or changing frameworks.
Why do modern apps still load slowly?
Most current web applications use frameworks such as React, Vue or Angular, and by default implement client -side rendering (CSR ).
What does this mean?
The browser requests the page.
The server responds with empty (or almost empty) HTML.
The browser starts downloading a large package of JavaScript.
Once downloaded, run it.
JavaScript makes calls to APIs to obtain the data.
Finally, the UI is built and displayed to the user.
This flow is sequential . Each step depends on the previous one. And that's what causes the famous "blank screen" that lasts for several seconds, especially on slow connections or low-power devices.