language server peaks at 1.1G RSS parsing /tg/station, idles at 580M on glibc and 1.0G on musl despite low utilization

probably heap fragmentation:

• on glibc, 10% of RSS is overhead
• on musl, 45% of RSS is overhead

tried throwing away some unnecessary data (bd255d1), which reduces in-use memory by 70% but doesn't reduce RSS at all:

• on glibc, 73% of RSS is overhead
• on musl, 85% of RSS is overhead