How Much Does JP Theme Switcher Bar Slow Down WordPress? We Measured It

JP Theme Switcher Bar is a WordPress plugin. Adds a theme switcher/ theme demo bar to the bottom of your site to allow users to switch. Our 3-context benchmark shows it barely registers (+3ms TTFB on activation).

B+

Measured Speed Score

How is this scored?

Our Benchmark Methodology

Every speed score on MakeWPFast is based on real performance measurements, not estimates. We install each plugin on a clean WordPress 6.9 setup (PHP 8.3, MariaDB, GeneratePress theme) and measure two key metrics:

PHP Memory Usage — how much additional memory the plugin consumes per request. Each doubling of memory overhead costs 10 points. High memory usage can cause crashes on shared hosting and limits how many plugins you can safely run together.

Database Queries — how many extra SQL queries the plugin runs per page load. Each 10x increase in query overhead costs 25 points. More queries mean more database work, slower pages, and harder scaling.

The score uses a logarithmic scale — the first few extra queries or megabytes matter more than going from 100 to 110 queries. This reflects real-world impact: the jump from 4 to 14 queries is far more noticeable than 100 to 110.

Grade	Score	What it means
A	90–100	Negligible impact. Safe to install on any hosting.
A-	80–89	Very light impact. Minimal overhead on any setup.
B+ / B / B-	65–79	Light impact. Adds some overhead but manageable on most setups.
C+ / C / C-	50–64	Moderate impact. May noticeably slow down budget hosting.
D+ / D	35–49	Heavy impact. Will affect page load times. Consider alternatives.
F	0–34	Severe impact. Significant resource usage that hurts performance.

Plugins marked "Not Yet Tested" have not been benchmarked yet. We do not estimate or guess scores — if there is no measured data, there is no grade.

Note: Benchmarks measure a plugin in isolation on a clean install. Real-world impact varies based on your hosting, other plugins, and how the plugin is configured.

Context	TTFB	Memory	Queries
⚡Activation	+3 ms	+0 MB	+11
🏠Homepage	+12 ms	+0 MB	+11
⚙️WP Admin	+-2 ms	+0 MB	+2

Moderate impact

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Plugin Overview

Active Installs10

Rating5/5 (1)

Tested Up ToWP 4.0.38

Last UpdatedSep 4, 2014

Downloads3K+

AuthorJosh Pollock

WP.orgView on WordPress.org

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JP Theme Switcher Bar Speed Score - MakeWPFast

Performance Analysis

Performance Impact

JP Theme Switcher Bar receives an estimated speed score of . Our real benchmark tests measured the following impact when activating this plugin:

TTFB impact: +3 ms
Memory impact: +0.0 MB
Additional DB queries: +11

Overall activation impact: moderate. This plugin adds moderate overhead. Monitor your site speed after installation.

Maintenance Status

Last updated: 2014-09-04. Trusted by 10 active installations.

Benchmark data measured in an isolated Docker environment (WordPress 6.8, PHP 8.3, GeneratePress). See our full methodology.

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Alternatives to JP Theme Switcher Bar

Plugin	Speed Score	Active Installs
Elementor Website Builder	D+	10M+
Classic Editor	A-	9M+
Yoast Duplicate Post	A-	4M+

Frequently Asked Questions

What's the actual cost of running JP Theme Switcher Bar?

Our 2026 benchmark recorded a +3ms TTFB increase and a memory delta of around 0MB on activation. The composite speed score of B+ is based on those measurements across three contexts.

Is JP Theme Switcher Bar a good fit for high-traffic WordPress sites?

JP Theme Switcher Bar earned a B+ on our composite scoring. With page caching (Cloudflare, WP Rocket, LiteSpeed Cache), the +3ms TTFB delta we measured rarely shows up on cached responses — most visitors won't notice it.

Does JP Theme Switcher Bar slow down WordPress?

JP Theme Switcher Bar has an estimated speed score of . It may noticeably affect your site speed. Consider alternatives if performance is critical.

Is JP Theme Switcher Bar still maintained?

JP Theme Switcher Bar was last updated on 2014-09-04. It has 10 active installations, indicating it is a functional plugin with a dedicated user base.

What are the best alternatives to JP Theme Switcher Bar?

Check our plugin reviews in the Other category for alternatives. We compare plugins side-by-side on speed, features, and user ratings to help you find the best fit.