Orkuncakilkaya
254097657e
Found by reading every builtin (Os.platform's 8 KB per call started it). Log builds its line only at or above the threshold and frees it; DateTime.format folds through + so its pieces go; Input.text encodes into one buffer; Path/Mime/Fs/Os free their temporaries on every path; string results of Text/Path/Mime/DateTime/Os dirs are fresh and Text frees a fresh argument. Reseeded. runtime_temps.ludic: 19.8 MB -> 0 over 20,000 rounds, 64 KB -> 0 over 200 of file work; clean under MallocScribble. string_temps still 0. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
55 lines
2.6 KiB
Text
55 lines
2.6 KiB
Text
# runtime_temps.ludic - the runtime's text builtins keep nothing a call does not hand back: a Log line
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# filtered out is never built and one written is freed, DateTime.format's pieces go, Path and Mime
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# free their working copies, Text frees a made argument, and Fs frees its temp names and buffers. Each
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# answer is fresh, so comparing it frees it. Prints 1 2 3 4 5, `grew 0` and `files grew 0` (the heap
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# is read on the Mac; 0 elsewhere).
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program RuntimeTemps {
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function words_round(i: int) -> int {
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var bad = 0
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Log.debug(`frame {i}`, "n", i, "big", long(i) * 1000)
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if DateTime.format(DateTime.from(2026, 9, 28, 12, 34, 7), "YYYY-MM-DD HH:mm:ss") != "2026-09-28 12:34:07" { bad += 1 }
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if Path.stem("a/b/camp.tar.png") != "camp.tar" or Path.normalize("a//b/./c/../d") != "a/b/d" { bad += 1 }
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if Path.dir("a/b/c.txt") != "a/b" or Path.base("a/b/c.txt") != "c.txt" or Path.ext("a/b/c.txt") != ".txt" { bad += 1 }
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if Path.join("a", "b") != "a/b" or Mime.of("x.PNG") == "" { bad += 1 }
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if Text.to_int(string(i)) != i or Text.upper(`ab{i}`) != `AB{i}` or Text.trim(` x{i} `) != `x{i}` { bad += 1 }
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if not Text.contains(`k{i}`, "k") or Text.replace(`a-{i}`, "-", "+") != `a+{i}` or Text.length(`{i}`) < 1 { bad += 1 }
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if Os.save_dir("RuntimeTemps") == "" { bad += 1 }
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return bad
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}
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function files_round(i: int, dir: string, a: string, b: string) -> int {
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var bad = 0
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if not Fs.write_text(a, "hello") { bad += 1 }
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if not Fs.copy(a, b) { bad += 1 }
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if not Fs.mkdir(dir) { bad += 1 }
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if Mime.sniff(b) == "" { bad += 1 }
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return bad
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}
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entry {
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Log.set_level(3)
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Log.warn("runtime_temps: a line that is written", "round", 1)
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if DateTime.format(DateTime.from(2026, 1, 2, 3, 4, 5), "YY/MM/DD") == "26/01/02" { print(1) }
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if Path.stem("x.png") == "x" and Path.normalize("/a/../b") == "/b" { print(2) }
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let kept = Text.upper("camp")
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let also = kept + "!"
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if kept == "CAMP" and also == "CAMP!" { print(3) }
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var bad = 0
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for i in 0 .. 200 { bad += words_round(i) }
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if bad == 0 { print(4) }
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let before = Os.heap_bytes()
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for i in 0 .. 20000 { bad += words_round(i) }
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let grew = Os.heap_bytes() - before
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let dir = Os.temp_dir() + "/runtime_temps_" + string(Os.pid())
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let a = dir + "/a.txt"
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let b = dir + "/b.txt"
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Fs.mkdir(dir)
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for i in 0 .. 20 { bad += files_round(i, dir, a, b) }
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if bad == 0 { print(5) }
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let fbefore = Os.heap_bytes()
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for i in 0 .. 200 { bad += files_round(i, dir, a, b) }
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let fgrew = Os.heap_bytes() - fbefore
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Fs.remove(a)
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Fs.remove(b)
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if bad == 0 { print(`grew {grew}`) } else { print(`bad {bad}`) }
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print(`files grew {fgrew}`)
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}
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}
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