Yashotantra Academy logo
← PHP theorytheory 0/50 · 0%
level 1
Curious · 0 XP
streak
0d
perfect
0
badges
0

100 XP to Apprentice

Performance · hard

38. OPcache & Performance

Speeding up PHP execution.

1 min read2 questionsup to 50 XPtopic 38/50

Read in another language

AI translates the explanation and quiz text while preserving code and answer scoring.

OPcache compiles PHP scripts into bytecode and caches it in shared memory, avoiding the cost of re-parsing and re-compiling source files on every request; it's essential for production performance. Preloading (opcache.preload, PHP 7.4+) can load classes/functions into memory once at server startup for even faster subsequent requests.

Profiling tools like Xdebug or Blackfire help locate real bottlenecks (often database queries or N+1 patterns) rather than guessing, since PHP itself is rarely the slowest part of a typical web request.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

Scoring

  • · Up to 30 XP from quiz accuracy.
  • · +15 XP for a perfect first attempt.
  • · +5 XP while a 3-day streak is running.
  • · 75% or higher marks the topic complete.

Check your understanding

  1. 1. What does OPcache primarily cache?

  2. 2. What PHP 7.4+ feature loads code into memory once at server startup?

Badges

First light
Pass your first topic
Sharp shooter
3 perfect first-try quizzes
On a roll
Study 3 days in a row
Week warrior
Study 7 days in a row
Grinder
Earn 500 XP
Deep diver
Earn 1500 XP