Is CSS3 `transition: all` Less Efficient Than Targeting Specific Properties?

CSS3 Transitions: Is "transition: all" Less Efficient than Targeting Specific Properties?

When utilizing CSS3 transitions, the convenience of "transition: all" can be tempting, allowing for efficient targeting of every transition property for multiple elements. However, the question arises: Does this "all" approach impact the smoothness and speed of animation rendering compared to targeting each element's specific transition property?

Potential Slowdown with "transition: all"

Yes, using "transition: all" can potentially introduce performance drawbacks. The browser constantly scans for all transition properties, even if a single property exists for an element. This unnecessary search operation can result in slowdown, as the browser attempts to determine what should be animated.

Simple Demonstration

Consider the following example: http://dabblet.com/gist/1657661. When altering the zoom level or font size, the entire page animates, even though only a few elements may visually change. Such unintended animations can significantly impact performance.

Recommendation: Target Specific Properties

To optimize performance, it's recommended to avoid using "transition: all" and instead specify direct transitions for each property. This ensures that only necessary animations occur, eliminating unnecessary performance overhead and the potential for unintended animations on page load.

Other Issues with "transition: all"

Beyond performance considerations, "transition: all" can also cause issues such as:

• Initial render flickering due to unanticipated animation on page load
• Inconsistent animation behavior across different browsers and devices

Therefore, for optimal performance and consistent animation results, it's advisable to avoid using "transition: all" and target specific transition properties instead.

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