Thomas Camlong
c73b139dbd
PHASE2-FINDINGS.md had grown past 1,200 lines mixing server memory, client rendering, methodology and a long list of rejected experiments, which made it unusable as a reference. Split under docs/perf/: README.md headline results and the change-by-change ratio table SERVER-MEMORY.md what the container's RAM is made of, layer by layer CLIENT-PERFORMANCE.md dashboard cost in Chrome: DOM, fibers, images, paint REJECTED.md ideas implemented, measured and abandoned, with numbers METHODOLOGY.md the tools, and the measurement traps that gave wrong answers PHASE2-FINDINGS.md is now an index so existing links keep working. METHODOLOGY.md is the part worth keeping: every wrong number in this investigation came from an instrument rather than the application, and each trap is written down - snapshots cannot explain peaks, V8 truncates snapshot strings to ~1 KiB, snapshot objects are not live handles, measuring without a forced GC measures V8's growth, taking a CDP snapshot added 134 MiB to the process being measured, per-component React attribution silently returns nothing on a production build, a fixed port can measure a leftover container, and a server-side change that moves a client-side metric means the workload changed.
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Performance findings
This file grew past 1,200 lines covering server memory, client rendering, methodology and a long
list of rejected ideas at once. It has been split by subject under docs/perf/:
| document | subject |
|---|---|
| docs/perf/README.md | Headline results and the change-by-change ratio table |
| docs/perf/SERVER-MEMORY.md | What the container's RAM is made of, layer by layer, and what reduced it |
| docs/perf/CLIENT-PERFORMANCE.md | Dashboard cost in Chrome: DOM, fibers, images, paint |
| docs/perf/REJECTED.md | Ideas implemented, measured, and abandoned — with their numbers |
| docs/perf/METHODOLOGY.md | The tools, and the measurement traps that produced wrong answers |
Result in one table
Server RAM, merge-base 06724cfeb vs this branch, two alternated runs per side, cgroup anonymous
memory — the figure that counts against a container limit:
| stage | before | after | change |
|---|---|---|---|
| peak | 376.6 MiB | 279.3 MiB | −26% |
| boot idle | 130.5 MiB | 62.4 MiB | −52% |
| after sign-in | 247.4 MiB | 142.9 MiB | −42% |
| dashboard loaded | 293.4 MiB | 170.4 MiB | −42% |
| 4 tabs, 2 boards | 366.5 MiB | 258.2 MiB | −30% |
| after 2 min idle soak | 323.7 MiB | 200.8 MiB | −38% |
No before/after range overlaps at any stage. Cost: +18% CPU, solid and non-overlapping.