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perf(json): 23.2 - a parsed tree can be let go (Value.free / Json.free: its nodes and lists, not its strings), a string is parsed in one allocation instead of one per character, the parser's cursor is freed, and gltf_load frees the last file's tree and the text it parsed

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300 parses of a 446 KB glTF: 2118 MB before, 528 MB with the one-allocation string, 94 MB freed.
A headless Maroon Lake at play: 2334 -> 2195 MB by footprint.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-27 22:17:27 +03:00
parent 537d3a0ab3
commit 9539f7bcec
3 changed files with 42 additions and 2 deletions
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4
packages/ludic.render3d/gltf.ludic
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@ -163,7 +163,11 @@ function gltf_load(render3d_st: mut Render3dState, dir: string, file: string, no
render3d_st.gltf_dir = dir
let text = Fs.read_text(dir + "/" + file)
if text == null { print(`gltf: cannot read {dir}/{file}`); return null }
# the last file's tree goes first (it is read only until the next load: ludic.anim's read.ludic),
# and the text once parsed - nothing gives memory back on its own (plan 23 of maroon-lake)
if render3d_st.gltf_doc != null { Json.free(render3d_st.gltf_doc) }
render3d_st.gltf_doc = Json.parse(text)
free(text)
let buffers = value_get(render3d_st.gltf_doc, "buffers")
let bin_uri = value_as_str(value_get(value_at(buffers, 0), "uri"))
render3d_st.gltf_bin = file_open(dir + "/" + bin_uri, "rb")