Tonye Onuoha

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲

𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄? Using "useFocusEffect" from "@react-navigation/native" is often better than "useEffect" when you're dealing with screen-specific logic in React Navigation.

"useEffect runs" when the component mounts...

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 (𝗘𝘅𝗽𝗼)

𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄?

You can dramatically speed up your mobile builds by enabling Expo’s EAS Build cache.

With the build cache turned on, Expo reuses previously compiled native code, meaning your subsequent builds...

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗥𝗲𝗮𝗰𝘁

𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄?

Using "useMemo" to cache expensive calculations can noticeably improve performance — but using it for simple values can actually slow your app down.

"useMemo" itself has a small cost, so it's most effective when:

-...

💡 𝗧𝗶𝗽 𝗼𝗳 𝘁𝗵𝗲 𝗗𝗮𝘆 — 𝗗𝗷𝗮𝗻𝗴𝗼 ⚡

Slow Django app? It’s often your queries, not Django.

Use "select_related()" for foreign keys and "prefetch_related()" for M2M to avoid N+1 queries and massively boost performance 🚀

Small ORM tweaks = faster APIs + happier users 😌

#Backend #WebDev #Performance