What CoreSimulator is, whether you can delete the CoreSimulator folder, and how to delete simulators in Xcode safely — plus the difference between simulator runtimes and device data, so you reclaim Mac disk space without breaking your iOS dev setup.

How to test network performance in a homelab, one layer at a time: which tool to use for throughput, latency, the NIC and the ISP, from iperf3 to mtr.

Video calls stutter while speed tests look fine. Run an iperf3 UDP test from the device you take calls on, and learn which jitter and loss numbers mean trouble.

Video calls stutter while speed tests look fine. Run an iperf3 UDP test from the device you take calls on, and learn which jitter and loss numbers mean trouble.

A 10 GbE home network needs the right test setup or it will look slower than gigabit. Here is how to measure 10 GbE throughput with iperf3 and what to expect.

An empty slowlog means nothing crossed the 10 ms default threshold, not that nothing is slow. Measured commands, thresholds, and what to check next.

A 99.9% month can hide the outage that dropped your call. Here is how the check interval and the average lose it, and what to log instead.

You can prove ISP throttling with iperf3, but only if you set the test up correctly. Here is what throttling looks like, and how to gather evidence.

Download ProbeDeck: ClickHouse® Client by Vladimir Chemeris on the App Store. See screenshots, ratings and reviews, user tips, and more apps like ProbeDeck:…

Download CacheDeck: Redis® Client by Vladimir Chemeris on the App Store. See screenshots, ratings and reviews, user tips, and more apps like CacheDeck: Redis®…