Experts speed up SQLmap by precisely identifying injectable parameters through manual reconnaissance and error-based or boolean-based testing before running it. They optimize SQLmap with flags like --threads to increase concurrent requests, --technique to limit payload types, and --level/--risk to balance thoroughness and speed. They also use tamper scripts to bypass WAF/IPS filters and reduce noise. Additionally, they customize timeouts and delays (--timeout, --delay) based on network conditions. Finally, targets with poorly configured databases or verbose error messages yield faster dumps, while heavily protected or slow servers naturally delay extraction.