Remove or Defer Unused CSS


For viewing all tips see here


Applicable To
All Browsers

How Improves Page Load Time
o        By optimizing network latency (HTTP Payload Size)
o        By optimizing browser rendering

Prologue
Before a browser can begin rendering a web page, it must first download and parse any style sheets that are required to lay out the page.


Why
o        Even if an external style sheet is in the cache, rendering is blocked until Browser extracts style sheets from the disk
o        CSS engine unnecessary process unused / unwanted rules contained the CSS file


How
o        Remove any inline style blocks containing CSS not being used in current page
o        Minifying CSS
o        If external style sheets being shared by multiple web pages and all CSS rules are not being used in all the pages then break down the style sheet files in many smaller files specific to web page need
o        Defer the style sheet if not required during startup by putting after the onLoad event is fired


Exceptions
None

Recommendations
None

Comments

Post a Comment

Popular posts from this blog

Performance Test Run Report Template

You have gathered requirements from clients, identified key critical business scenarios, analyzed the workload distributions, found out performance goals and requirements, identified  tool for generating load, setup the test environment, designed the scripts, executed the performance run, collected the raw data, analyzed it, what next?  Send information to stakeholders? No!!  Wait!! It needs to formatted, customized for different stakeholder(s) and reported accordingly. This article suggests one of the ways to report performance run results to client especially if the performance testing activity has been outsourced to yours company.  It discusses the performance report template and importantly the reasons for including the items in the report. The performance report template contains information by data collected from client side only and doesn’t discuss / talk about data from server side like processor utilization etc. Broadly the performance report has been divided in three major
Read more

Understanding Blockchain

This notes will cover below questions... Introduction to Blockchain What is the difference between Blockchain and Bitcoin? What are some other uses of blockchain that go beyond bitcoin? History of blockchain Could you explain the blockchain process in laymen terms? If all data is available to the public. Can anyone know my bank balance (in Bitcoin)? Introduction to Blockchain The Blockchain is a decentralized and distributed public (digital) ledger where transactions are recorded and confirmed anonymously. It’s a record of events that is shared between many parties. More importantly, once information is entered, it cannot be altered without altering subsequent blocks. WTF is the blockchain? A guide for total beginners What is the difference between Blockchain and Bitcoin? The blockchain is a technology
Read more

Bugs Management in Agile Project

Agile has a refreshing approach to bugs, especially when contrasted with traditional waterfall practices. Historically, teams would postpone bugs to a stabilization phase. This stabilization phase was long and tedious, typically with high stress and long hours. Agile, on the other hand, promotes the following thought processes: Carrying bug debt is unhealthy and sometimes, even destructive. We should fix bugs, not track them. A feature isn't done until the bugs are fixed. Quality is part of the overall cost. Bugs are prioritized against new features. A bug needs to be more important than the next new feature. Notes All new features have a "bug tail." The bug tail is the diminishing number of open bugs on the new functionality. When a feature is added, bugs are introduced. Most are discovered and fixed immediately by the team as a part of feature development: some a few days later, others not until long after a story is considered &quo
Read more