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ralph(eval): switch home target zest -> sincereintent (per request)

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sincereintent home config baseline: nrThunks 5,323,428 / calls 3,227,404 /
primops 1,565,120 (deterministic).
This commit is contained in:
Sridhar Ratnakumar 2026-05-28 22:22:15 -04:00
parent 7477e25b46
commit 66babd6d2b
2 changed files with 11 additions and 11 deletions
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6
docs/eval-bench.sh
View file

@ -1,6 +1,6 @@
#!/usr/bin/env bash
# Ralph eval-time benchmark — counter-based.
# Usage: ralph-bench.sh [target] target = pureintent | zest | (both)
# Usage: ralph-bench.sh [target] target = pureintent | sincereintent | (both)
#
# Primary metric: deterministic eval-work counters from NIX_SHOW_STATS:
# nrThunks, nrFunctionCalls, nrPrimOpCalls.
@ -17,11 +17,11 @@ ONLY="${1:-}"
declare -A ATTR
ATTR[pureintent]="$FLAKE#nixosConfigurations.pureintent.config.system.build.toplevel.drvPath"
ATTR[zest]="$FLAKE#homeConfigurations.\"srid@zest\".activationPackage.drvPath"
ATTR[sincereintent]="$FLAKE#homeConfigurations.\"srid@sincereintent\".activationPackage.drvPath"
num() { grep -o "\"$1\": [0-9.]*" /tmp/ralph-stats.json | grep -o '[0-9.]*' | head -1; }
for target in pureintent zest; do
for target in pureintent sincereintent; do
[ -n "$ONLY" ] && [ "$ONLY" != "$target" ] && continue
NIX_SHOW_STATS=1 nix eval --raw "${ATTR[$target]}" --option eval-cache false \
>/dev/null 2>/tmp/ralph-stats.json

16
docs/eval-time-ralph-report.md
View file

@ -4,7 +4,7 @@ Iterative measurement-driven reduction of Nix **evaluation** time for the two
configs that get evaluated most often on this machine:
- `pureintent` — the NixOS system (`nixosConfigurations.pureintent`)
- `zest` — the home-manager config (`homeConfigurations."srid@zest"`)
- `sincereintent` — the home-manager config (`homeConfigurations."srid@sincereintent"`)
## Methodology
@ -25,7 +25,7 @@ work and are **byte-identical across runs** (independent of CPU clock, load, GC)
# - --option eval-cache false forces a full re-eval every run
# - reports nrThunks / nrFunctionCalls / nrPrimOpCalls per target (deterministic)
nix eval --raw .#nixosConfigurations.pureintent.config.system.build.toplevel.drvPath --option eval-cache false
nix eval --raw '.#homeConfigurations."srid@zest".activationPackage.drvPath' --option eval-cache false
nix eval --raw '.#homeConfigurations."srid@sincereintent".activationPackage.drvPath' --option eval-cache false
```
No `nix store gc` between runs (per request). The eval cache is disabled rather
@ -43,8 +43,8 @@ then aggregate self/inclusive frames (collapsed-stack format).
| Target | nrThunks | nrFunctionCalls | nrPrimOpCalls |
|------------|------------|-----------------|---------------|
| pureintent | 20,400,114 | 12,975,268 | 6,507,025 |
| zest | 11,066,680 | 7,091,428 | 3,587,586 |
| pureintent | 20,400,114 | 12,975,268 | 6,507,025 |
| sincereintent | 5,323,428 | 3,227,404 | 1,565,120 |
Env: nix 2.34.7, x86_64-linux.
@ -52,10 +52,10 @@ Env: nix 2.34.7, x86_64-linux.
(Δ% is on nrThunks vs baseline for the affected target.)
| Cycle | Change | pureintent thunks | zest thunks | Verdict |
|-------|--------|-------------------|-------------|---------|
| 0 | baseline | 20,400,114 | 11,066,680 | — |
| 1 | pureintent: `documentation.nixos.enable = false` (drop NixOS options manual; option doc-strings no longer evaluated) | **19,201,996 (−5.9%)** | 11,066,680 | ✅ commit |
| Cycle | Change | pureintent thunks | sincereintent thunks | Verdict |
|-------|--------|-------------------|----------------------|---------|
| 0 | baseline | 20,400,114 | 5,323,428 | — |
| 1 | pureintent: `documentation.nixos.enable = false` (drop NixOS options manual; option doc-strings no longer evaluated) | **19,201,996 (−5.9%)** | 5,323,428 | ✅ commit |
## Dead ends