Improve the real or perceived speed of the site, or monitor performance metrics.

Tome Forms

This module allows Drupal forms to be exported a Tome static site, with the form submission handled in a variety of ways.

Drupal Performance Monitoring (Elastic APM)

Drupal Performance Monitoring

this module use apm-agent-php it enables the site to trace the execution of operations , sending performance m

Entity Cache Generator

This module provides a GUI to manually generate entity cache for selected entity types.

Sleepy Cron

This module aims to preserve server resources (processors, memory, thus electricity) by not running the cron on websites that are not used.

DeferJs

DeferJs module is based on a tiny library deferjs.

Resource usage meter

Adds to HTTP headers of a response the performance data of the request not only
as the actual execution time in seconds (rtime), but also the utime and
stime:

  • rtime represents the total duration of the response generation process.

  • utime represents the actual CPU time, exclusively spent on processing only
    the PHP code of the current request, excluding other background processes.

  • stime represents the CPU time spent on kernel processes like disk read/writes
    and other IO operations.

More information: https://www.baeldung.com/linux/total-process-cpu-usage#2-the-cpu-usage

Additionally, it shows the memory usage and the disk read (inblock) and write (oublock) operations.

An example of the HTTP headers output of a response:

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