PHP Performance Optimization
Is your PHP application getting slower under load? I profile production PHP, find the real bottleneck — whether it's a slow query, a misconfigured opcache, repeated work in a loop or a memory leak — and optimize it.
I work with plain PHP and Symfony/Laravel stacks, using Xdebug, Blackfire, tideways and php-spx profiling data, plus query logs and slow-log analysis to back every change.
What I Can Help With
Profile and optimize PHP applications that are slow, memory-heavy or consuming too much CPU.
Typical Problems
Relevant Experience
Profiled and optimized the PHP backend for Cenoskop (cenoskop.sk) — a price comparison engine processing 30M+ products daily. Used Blackfire to find hot paths in Symfony, fixed unbounded queries and opcache misconfiguration that were causing response time spikes under load.
What Is Included
How It Works
You share what you see — timings, slow-log, profiling output. I reproduce the bottleneck with profiling, confirm the cause with data, implement the fix, and verify the improvement with before/after measurements. Most single hot paths take a few hours. Full profiling across an application takes a day.
Starting from €499
Full profiling and a written set of prioritized recommendations. Implementation of changes is quoted separately.
Frequently Asked Questions
What does a PHP performance engagement start with?
A profiling pass — I instrument the application with Xdebug or Blackfire, reproduce the slow path, and identify the exact lines/functions responsible.
Can you optimize without a staging copy?
Yes — profiling and slow-log analysis only need read access. I avoid changing code in production; fixes are proposed and applied together.
Related Services
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PHP Memory Leak Investigation
Find what causes PHP memory usage to grow until the process dies.
MySQL Performance Optimization
Optimize MySQL queries, indexes and schema for a production workload.
Backend Performance Audit
Find and prioritize the real bottlenecks across your full backend stack.
Systems I've Built
Cenoskop / Levnobot
Crawler monitoring millions of products. Processing 30M products daily and comparing them.
Built and maintain the full crawling pipeline — from scraping through Elasticsearch indexing to price comparison.
Niftycent
Price intelligence engine for the US market. Processing large-scale product data.
Built the data pipeline and crawling infrastructure for large-scale US product monitoring.
AnalyticsForWebsite
Custom solution for collecting and evaluating traffic metrics with emphasis on processing speed and minimizing backend load.
Designed and built the backend for fast traffic metric collection and evaluation.
Paidshield
Chat application with end-to-end encryption.
Built the backend and encryption layer for a secure chat application.
facha.sk
Find a job or offer your services.
Built the Go backend — API, matching logic and deployment.
Not sure what's wrong?
Write what's happening and paste anything relevant — errors, logs, metrics. I'll have a look and tell you what I think.