Embedded Linux boots in milliseconds

Short summary

Fast embedded Linux boot requires optimizing every pipeline stage: U-Boot, kernel drivers, filesystem, and systemd services. Key techniques include removing bootloader delays, minimal kernel builds, service parallelization, and defining user-visible readiness targets. Measure cold-boot performance on production storage.

• •U-Boot and kernel delays are common bottlenecks—remove bootloader countdowns and unused drivers
• •Choose filesystem strategy (SquashFS vs ext4) and defer non-essential services for first interaction
• •Measure cold-boot performance on production-like storage to avoid optimizing the wrong stage

Generated with AI, which can make mistakes.