There's another issue at play here. Nobody makes money from making SVGO faster. Your customers don't run SVGO and only care about the performance of the outpu

There's another issue at play here. Nobody makes money from making SVGO faster. Your customers don't run SVGO and only care about the performance of the output. Devs care, but not enough to do anything about it. Companies care about dev productivity, but the cost of the hours to run through the profiler isn't something they are willing to pay for. And finally, there aren't enough maintainers/contributors to these projects. The core team is some volunteers. When they have spare time for the project, it's almost always going to be used to keep up with web standards, add missing features, or chase down bugs that impact the final output. They know performance matters, but thers's always something more important to do instead.