Sure, if the companies you've worked for are in a field that needs incremental performance gains and are willing to pay for it then that's totally rational. Ty

Sure, if the companies you've worked for are in a field that needs incremental performance gains and are willing to pay for it then that's totally rational. Typically I see client-side performance concerns outweighing server-side performance in a ratio of 70/30 or so, with the remaining server-side performance biased towards I/O concerns like waiting for data, or file system reads with a ratio of 90/10 or more. That puts the actual saving available to language or algorithm changes in the app layer to be less than 3% for the kinds of apps I've worked on. I usually work at companies who are starting out, looking for Product Market Fit, where those marginal gains aren't worth the cost of reimplementing.