Is it necessary to upgrade to ci3.0?

I downloaded ci2.2 and ci3.0 at the same time, with the AB tool to test the ab-c1000-n1000ci2ci3, found that ci2demo page can respond to 480 requests per second, while ci3demo page can only respond to 330 requests. the performance difference is about 1/3. so, is ci3.0 worth using in the new project... I downloaded ci2.2 and ci3.0 at the same time and tested AB-c 1000-n 1000 ci2/ci3 with the AB tool. I found that ci2 demo pages can respond to 480 requests per second, the ci3 demo page can only respond to 330 requests. the performance difference is about 1/3. so, is ci3.0 worth using in the new project, or is there any underlying layer or high-quality overflight with the old ci2.2. ci3.0?

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I downloaded ci2.2 and ci3.0 at the same time and tested AB-c 1000-n 1000 ci2/ci3 with the AB tool. I found that ci2 demo pages can respond to 480 requests per second, the ci3 demo page can only respond to 330 requests. the performance difference is about 1/3. so, is ci3.0 worth using in the new project, or is there any underlying layer or high-quality overflight with the old ci2.2. ci3.0?

Upgrade is required. I personally think that using the native solution after the session upgrade is the biggest benefit of this upgrade.
Other mysqli and encryption are also good. The new team has done a lot of work to officially release the new version.

Recently I tried more than 10 frameworks, including laravel yii initphp doophp micromvc slim... in terms of performance, ease of understanding, and human logic, ci is a balance of trade. I just don't know if I want to use the latest version ci2.2 or ci3.0.

You can see the introduction of CI3.0. session and encryption security are updated, and the database driver is rewritten. If you don't have this problem, you don't have to upgrade it. I met many of the challenges of PDO, which can be used only after being upgraded.

CI3.0 has no namespace and there is no need to upgrade it !!!!!