It is forever baffling to me that so many devs don’t seem to appreciate that small performance issues compound, especially when they’re in a hot path, and have dependent calls.
Databases in particular, since that’s my job. “This query runs in 2 msec, it’s fast enough.” OK, but it gets called 10x per flow because the ORM is absurdly stupid; if you cut it down by 500 microseconds, you’d save 5 msec. Or if you’d make the ORM behave, you could save 18 msec, plus the RTT for each query you neglected to account for.
Databases in particular, since that’s my job. “This query runs in 2 msec, it’s fast enough.” OK, but it gets called 10x per flow because the ORM is absurdly stupid; if you cut it down by 500 microseconds, you’d save 5 msec. Or if you’d make the ORM behave, you could save 18 msec, plus the RTT for each query you neglected to account for.