Brummel
07bff24527
Two new throughput fixtures targeting blind spots in the 21'a
corpus:
- bench_closure_chain exercises the build_pair_drop_fn codegen
path (the 18c.4 doubled-braces trigger). Each iteration of
run_loop allocates a {thunk, env} closure pair via the
let-rec-name-as-value escape route. Sizes 10k / 100k / 500k.
rc/bump = 4.14x — materially worse than the 2.91x / 2.59x of
the linear/tree fixtures, exposing that closure work pays the
RC alloc tax twice (pair + env-struct).
- bench_hof_pipeline exercises poly-ADT instantiation and
indirect dispatch via fold_with_fn over List<a>. Sizes 100k /
1M / 3M elements. Ratios essentially match bench_list_sum,
confirming the 13b static-template-plus-ctor-inline design
has zero measurable overhead at this scale.
Baseline file extends from 31 to 47 metrics. The two new fixtures
build clean under all three allocators; the rc-arm build exercises
the per-type drop fn for the closure-pair, providing a tripwire
for any future 18c.4-class IR malformedness.
JOURNAL records both surprises (4.14x closure tax, ~zero HOF/poly
overhead) and explicitly notes the dispersion observation on
explicit_at_rc.p99 — three captures today (357.5 / 294.6 / 251.5)
confirm wide run-to-run variance on that fixture. Methodology
upgrade (n>=10 captures or tighter fixture) deferred to 21'c.
bench/run.sh fixtures array updated. bench/check.py needed no
changes — its parser handles the wider table by metric name.
2 lines
3.5 KiB
JSON
2 lines
3.5 KiB
JSON
{"defs":[{"ctors":[{"fields":[],"name":"Nil"},{"fields":[{"k":"var","name":"a"},{"args":[{"k":"var","name":"a"}],"k":"con","name":"List"}],"name":"Cons"}],"doc":"Polymorphic singly-linked list. Same shape as list_map_poly's List, replicated here so the bench fixture is self-contained.","kind":"type","name":"List","vars":["a"]},{"body":{"cond":{"args":[{"name":"n","t":"var"},{"lit":{"kind":"int","value":0},"t":"lit"}],"fn":{"name":"==","t":"var"},"t":"app"},"else":{"args":[{"args":[{"name":"n","t":"var"},{"lit":{"kind":"int","value":1},"t":"lit"}],"fn":{"name":"-","t":"var"},"t":"app"},{"args":[{"args":[{"name":"n","t":"var"},{"lit":{"kind":"int","value":1},"t":"lit"}],"fn":{"name":"-","t":"var"},"t":"app"},{"name":"acc","t":"var"}],"ctor":"Cons","t":"ctor","type":"List"}],"fn":{"name":"build_n","t":"var"},"t":"app","tail":true},"t":"if","then":{"name":"acc","t":"var"}},"doc":"Build [0, 1, ..., n-1] :: List Int. Tail-recursive accumulator form.","kind":"fn","name":"build_n","params":["n","acc"],"type":{"effects":[],"k":"fn","params":[{"k":"con","name":"Int"},{"args":[{"k":"con","name":"Int"}],"k":"con","name":"List"}],"ret":{"args":[{"k":"con","name":"Int"}],"k":"con","name":"List"}}},{"body":{"args":[{"name":"x","t":"var"},{"lit":{"kind":"int","value":1},"t":"lit"}],"fn":{"name":"+","t":"var"},"t":"app"},"doc":"Add 1 to an Int. Used as the HOF argument to fold_with_fn.","kind":"fn","name":"inc","params":["x"],"type":{"effects":[],"k":"fn","params":[{"k":"con","name":"Int"}],"ret":{"k":"con","name":"Int"}}},{"body":{"arms":[{"body":{"name":"acc","t":"var"},"pat":{"ctor":"Nil","fields":[],"p":"ctor"}},{"body":{"args":[{"name":"f","t":"var"},{"name":"t","t":"var"},{"args":[{"name":"acc","t":"var"},{"args":[{"name":"h","t":"var"}],"fn":{"name":"f","t":"var"},"t":"app"}],"fn":{"name":"+","t":"var"},"t":"app"}],"fn":{"name":"fold_with_fn","t":"var"},"t":"app","tail":true},"pat":{"ctor":"Cons","fields":[{"name":"h","p":"var"},{"name":"t","p":"var"}],"p":"ctor"}}],"scrutinee":{"name":"xs","t":"var"},"t":"match"},"doc":"Polymorphic foldl-with-mapping. Apply f:(a)->Int to every element of xs, sum into acc. Tail-recursive on (xs, acc); the f arg is forwarded unchanged.","kind":"fn","name":"fold_with_fn","params":["f","xs","acc"],"type":{"body":{"effects":[],"k":"fn","params":[{"effects":[],"k":"fn","params":[{"k":"var","name":"a"}],"ret":{"k":"con","name":"Int"}},{"args":[{"k":"var","name":"a"}],"k":"con","name":"List"},{"k":"con","name":"Int"}],"ret":{"k":"con","name":"Int"}},"k":"forall","vars":["a"]}},{"body":{"args":[{"args":[{"name":"inc","t":"var"},{"args":[{"name":"n","t":"var"},{"args":[],"ctor":"Nil","t":"ctor","type":"List"}],"fn":{"name":"build_n","t":"var"},"t":"app"},{"lit":{"kind":"int","value":0},"t":"lit"}],"fn":{"name":"fold_with_fn","t":"var"},"t":"app"}],"op":"io/print_int","t":"do"},"doc":"Build [0..n-1], fold with inc, print sum of (inc x).","kind":"fn","name":"run_one","params":["n"],"type":{"effects":["IO"],"k":"fn","params":[{"k":"con","name":"Int"}],"ret":{"k":"con","name":"Unit"}}},{"body":{"lhs":{"args":[{"lit":{"kind":"int","value":100000},"t":"lit"}],"fn":{"name":"run_one","t":"var"},"t":"app"},"rhs":{"lhs":{"args":[{"lit":{"kind":"int","value":1000000},"t":"lit"}],"fn":{"name":"run_one","t":"var"},"t":"app"},"rhs":{"args":[{"lit":{"kind":"int","value":3000000},"t":"lit"}],"fn":{"name":"run_one","t":"var"},"t":"app"},"t":"seq"},"t":"seq"},"kind":"fn","name":"main","params":[],"type":{"effects":["IO"],"k":"fn","params":[],"ret":{"k":"con","name":"Unit"}}}],"imports":[],"name":"bench_hof_pipeline","schema":"ailang/v0"}
|