Efficient resource use
New PHP processes start only when needed; idle ones are stopped.
PHP LSAPIsuEXEC
Worker mode.
Worker mode starts PHP processes only when requests arrive and ends them when idle. It uses the least memory and supports custom php.ini files — including CloudLinux PHP Selector.
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What Is suEXEC?
suEXEC runs each PHP process as the owner of the account instead of the web server user. If one account is compromised, its scripts can't read or change other users' files — essential for shared hosting.
Benefits
Why Worker Mode
Custom php.ini
Works with per-user php.ini files and CloudLinux CageFS / PHP Selector.
Comparison
Versus Other Setups
| Setup | How it compares |
|---|---|
| Apache / nginx with suPHP | suPHP uses CGI, which is far slower than LSAPI. Every LiteSpeed mode outperforms it. |
| Apache / nginx with PHP-FPM | FastCGI is faster than CGI, but LSAPI is still about 20% faster — and needs no per-user pool configuration. |
Keep in mind
Limitations
- Each process has its own short-lived opcode cache, so opcode and APCu caching are not effective.
- Starting fresh processes costs more than forking, so it is slightly slower than Daemon or ProcessGroup mode.
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