diff options
| author | Jean Boussier <[email protected]> | 2024-10-29 11:00:16 +0100 |
|---|---|---|
| committer | Hiroshi SHIBATA <[email protected]> | 2024-11-01 13:04:24 +0900 |
| commit | 59eebeca02325861dd16452c9b85f4920bccd84f (patch) | |
| tree | dcc4bd7fde4a87782599354843ea788870285296 /ext/json/parser/parser.rl | |
| parent | d329896fb590de96832d522b475404cae1279767 (diff) | |
[ruby/json] Allocate the initial generator buffer on the stack
Ref: https://github.com/ruby/json/issues/655
Followup: https://github.com/ruby/json/issues/657
Assuming the generator might be used for fairly small documents
we can start with a reasonable buffer size of the stack, and if
we outgrow it, we can spill on the heap.
In a way this is optimizing for micro-benchmarks, but there are
valid use case for fiarly small JSON document in actual real world
scenarios, so trashing the GC less in such case make sense.
Before:
```
ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) +YJIT [arm64-darwin23]
Warming up --------------------------------------
Oj 518.700k i/100ms
JSON reuse 483.370k i/100ms
Calculating -------------------------------------
Oj 5.722M (± 1.8%) i/s (174.76 ns/i) - 29.047M in 5.077823s
JSON reuse 5.278M (± 1.5%) i/s (189.46 ns/i) - 26.585M in 5.038172s
Comparison:
Oj: 5722283.8 i/s
JSON reuse: 5278061.7 i/s - 1.08x slower
```
After:
```
ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) +YJIT [arm64-darwin23]
Warming up --------------------------------------
Oj 517.837k i/100ms
JSON reuse 548.871k i/100ms
Calculating -------------------------------------
Oj 5.693M (± 1.6%) i/s (175.65 ns/i) - 28.481M in 5.004056s
JSON reuse 5.855M (± 1.2%) i/s (170.80 ns/i) - 29.639M in 5.063004s
Comparison:
Oj: 5692985.6 i/s
JSON reuse: 5854857.9 i/s - 1.03x faster
```
https://github.com/ruby/json/commit/fe607f4806
Diffstat (limited to 'ext/json/parser/parser.rl')
| -rw-r--r-- | ext/json/parser/parser.rl | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/json/parser/parser.rl b/ext/json/parser/parser.rl index c627014593..499cc693a3 100644 --- a/ext/json/parser/parser.rl +++ b/ext/json/parser/parser.rl @@ -919,7 +919,7 @@ static VALUE cJSON_parser_s_allocate(VALUE klass) { JSON_Parser *json; VALUE obj = TypedData_Make_Struct(klass, JSON_Parser, &JSON_Parser_type, json); - fbuffer_init(&json->fbuffer, 0); + fbuffer_stack_init(&json->fbuffer, 0, NULL, 0); return obj; } |