Yoshimura Hiroyuki

This Plugin blocks comments which is judged to be ‘spam’ by a standard WordPress function. When a ‘spam’ comment is submitted, an error message is shown and the comment will not registerd.
このプラグインは、WordPress標準のコメントブラックリストによる判定の結果’spam’となったコメントを、登録させないで、エラー画面を表示する。
つまり、スパムコメントが溜まりません。
<h3>Arbitrary section 1</h3>

Spam Blocker S1

This Plugin blocks comments which is judged to be 'spam' by a standard WordPress function.

Pippin Williamson

Modifies the Empty Spam action in WordPress to process the spam deletion in batches, allowing you to delete thousands or even hundreds of thousands of spam comments at once without killing your server.
Have you found a bug or have a suggestion or improvement you’d like to submit? This plugin is available on <a href="https://github.com/pippinsplugins/batch-comment-spam-deletion" rel="nofollow ugc">Github</a> and pull requests are welcome!

Batch Comment Spam Deletion

Modifies the Empty Spam action in WordPress to process the spam deletion in batches instead of all at once.

Spam Blocker S1 vs Batch Comment Spam Deletion