[ruby/json] json_string_unescape: assume the string doesn't need escaping
If that assumption holds true, then we don't need to copy the string into a buffer to unescape it. For small string is just saves copying, but for large ones it also saves a malloc/free combo. Before: ``` == Parsing twitter.json (567916 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) +YJIT [arm64-darwin23] Warming up -------------------------------------- json 52.000 i/100ms oj 61.000 i/100ms oj strict 70.000 i/100ms Oj::Parser 71.000 i/100ms rapidjson 55.000 i/100ms Calculating ------------------------------------- json 510.111 (± 2.9%) i/s (1.96 ms/i) - 2.548k in 5.000029s oj 610.232 (± 3.1%) i/s (1.64 ms/i) - 3.050k in 5.003725s oj strict 713.231 (± 3.2%) i/s (1.40 ms/i) - 3.570k in 5.010902s Oj::Parser 762.598 (± 3.0%) i/s (1.31 ms/i) - 3.834k in 5.033130s rapidjson 553.029 (± 7.4%) i/s (1.81 ms/i) - 2.750k in 5.022630s Comparison: json: 510.1 i/s Oj::Parser: 762.6 i/s - 1.49x faster oj strict: 713.2 i/s - 1.40x faster oj: 610.2 i/s - 1.20x faster rapidjson: 553.0 i/s - same-ish: difference falls within error == Parsing citm_catalog.json (1727030 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) +YJIT [arm64-darwin23] Warming up -------------------------------------- json 28.000 i/100ms oj 33.000 i/100ms oj strict 37.000 i/100ms Oj::Parser 43.000 i/100ms rapidjson 38.000 i/100ms Calculating ------------------------------------- json 303.853 (± 3.6%) i/s (3.29 ms/i) - 1.540k in 5.076079s oj 348.009 (± 2.0%) i/s (2.87 ms/i) - 1.749k in 5.027738s oj strict 396.679 (± 3.3%) i/s (2.52 ms/i) - 1.998k in 5.042271s Oj::Parser 406.699 (± 2.2%) i/s (2.46 ms/i) - 2.064k in 5.077587s rapidjson 393.463 (± 3.3%) i/s (2.54 ms/i) - 1.976k in 5.028501s Comparison: json: 303.9 i/s Oj::Parser: 406.7 i/s - 1.34x faster oj strict: 396.7 i/s - 1.31x faster rapidjson: 393.5 i/s - 1.29x faster oj: 348.0 i/s - 1.15x faster ``` After: ``` == Parsing twitter.json (567916 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) +YJIT [arm64-darwin23] Warming up -------------------------------------- json 56.000 i/100ms oj 62.000 i/100ms oj strict 72.000 i/100ms Oj::Parser 77.000 i/100ms rapidjson 55.000 i/100ms Calculating ------------------------------------- json 568.025 (± 2.1%) i/s (1.76 ms/i) - 2.856k in 5.030272s oj 630.936 (± 1.4%) i/s (1.58 ms/i) - 3.162k in 5.012630s oj strict 705.784 (±11.2%) i/s (1.42 ms/i) - 3.456k in 5.006706s Oj::Parser 783.989 (± 1.7%) i/s (1.28 ms/i) - 3.927k in 5.010343s rapidjson 557.630 (± 2.0%) i/s (1.79 ms/i) - 2.805k in 5.032388s Comparison: json: 568.0 i/s Oj::Parser: 784.0 i/s - 1.38x faster oj strict: 705.8 i/s - 1.24x faster oj: 630.9 i/s - 1.11x faster rapidjson: 557.6 i/s - same-ish: difference falls within error == Parsing citm_catalog.json (1727030 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) +YJIT [arm64-darwin23] Warming up -------------------------------------- json 29.000 i/100ms oj 33.000 i/100ms oj strict 38.000 i/100ms Oj::Parser 43.000 i/100ms rapidjson 37.000 i/100ms Calculating ------------------------------------- json 319.271 (± 3.1%) i/s (3.13 ms/i) - 1.595k in 5.001128s oj 347.946 (± 1.7%) i/s (2.87 ms/i) - 1.749k in 5.028395s oj strict 396.914 (± 3.0%) i/s (2.52 ms/i) - 2.014k in 5.079645s Oj::Parser 409.311 (± 2.7%) i/s (2.44 ms/i) - 2.064k in 5.046626s rapidjson 394.752 (± 1.5%) i/s (2.53 ms/i) - 1.998k in 5.062776s Comparison: json: 319.3 i/s Oj::Parser: 409.3 i/s - 1.28x faster oj strict: 396.9 i/s - 1.24x faster rapidjson: 394.8 i/s - 1.24x faster oj: 347.9 i/s - 1.09x faster ``` https://github.com/ruby/json/commit/7e0f66546a
This commit is contained in:
parent
081689b9e2
commit
165cc6cf40
@ -1450,7 +1450,7 @@ case 16:
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}
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}
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static inline VALUE build_string(const char *buffer, const char *bufferStart, bool intern, bool symbolize)
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static inline VALUE build_string(const char *start, const char *end, bool intern, bool symbolize)
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{
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if (symbolize) {
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intern = true;
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@ -1458,12 +1458,12 @@ static inline VALUE build_string(const char *buffer, const char *bufferStart, bo
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VALUE result;
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# ifdef HAVE_RB_ENC_INTERNED_STR
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if (intern) {
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result = rb_enc_interned_str(bufferStart, (long)(buffer - bufferStart), rb_utf8_encoding());
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result = rb_enc_interned_str(start, (long)(end - start), rb_utf8_encoding());
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} else {
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result = rb_utf8_str_new(bufferStart, (long)(buffer - bufferStart));
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result = rb_utf8_str_new(start, (long)(end - start));
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}
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# else
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result = rb_utf8_str_new(bufferStart, (long)(buffer - bufferStart));
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result = rb_utf8_str_new(start, (long)(end - start));
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if (intern) {
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# if STR_UMINUS_DEDUPE_FROZEN
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// Starting from MRI 3.0 it is preferable to freeze the string
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@ -1488,7 +1488,7 @@ static inline VALUE build_string(const char *buffer, const char *bufferStart, bo
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}
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static const size_t MAX_STACK_BUFFER_SIZE = 128;
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static VALUE json_string_unescape(char *string, char *stringEnd, int intern, int symbolize)
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static VALUE json_string_unescape(char *string, char *stringEnd, bool intern, bool symbolize)
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{
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VALUE result = Qnil;
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size_t bufferSize = stringEnd - string;
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@ -1496,6 +1496,11 @@ static VALUE json_string_unescape(char *string, char *stringEnd, int intern, int
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int unescape_len;
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char buf[4];
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pe = memchr(p, '\\', bufferSize);
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if (RB_LIKELY(pe == NULL)) {
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return build_string(string, stringEnd, intern, symbolize);
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}
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if (bufferSize > MAX_STACK_BUFFER_SIZE) {
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# ifdef HAVE_RB_ENC_INTERNED_STR
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bufferStart = buffer = ALLOC_N(char, bufferSize ? bufferSize : 1);
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@ -1598,7 +1603,7 @@ static VALUE json_string_unescape(char *string, char *stringEnd, int intern, int
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buffer += pe - p;
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}
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result = build_string(buffer, bufferStart, intern, symbolize);
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result = build_string(bufferStart, buffer, intern, symbolize);
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if (bufferSize > MAX_STACK_BUFFER_SIZE) {
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ruby_xfree(bufferStart);
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@ -1608,7 +1613,7 @@ static VALUE json_string_unescape(char *string, char *stringEnd, int intern, int
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}
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#line 1612 "parser.c"
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#line 1617 "parser.c"
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enum {JSON_string_start = 1};
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enum {JSON_string_first_final = 8};
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enum {JSON_string_error = 0};
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@ -1616,7 +1621,7 @@ enum {JSON_string_error = 0};
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enum {JSON_string_en_main = 1};
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#line 640 "parser.rl"
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#line 645 "parser.rl"
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static int
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@ -1637,15 +1642,15 @@ static char *JSON_parse_string(JSON_Parser *json, char *p, char *pe, VALUE *resu
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VALUE match_string;
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#line 1641 "parser.c"
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#line 1646 "parser.c"
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{
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cs = JSON_string_start;
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}
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#line 660 "parser.rl"
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#line 665 "parser.rl"
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json->memo = p;
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#line 1649 "parser.c"
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#line 1654 "parser.c"
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{
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if ( p == pe )
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goto _test_eof;
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@ -1670,7 +1675,7 @@ case 2:
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goto st0;
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goto st2;
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tr2:
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#line 627 "parser.rl"
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#line 632 "parser.rl"
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{
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*result = json_string_unescape(json->memo + 1, p, json->parsing_name || json-> freeze, json->parsing_name && json->symbolize_names);
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if (NIL_P(*result)) {
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@ -1680,14 +1685,14 @@ tr2:
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{p = (( p + 1))-1;}
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}
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}
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#line 637 "parser.rl"
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#line 642 "parser.rl"
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{ p--; {p++; cs = 8; goto _out;} }
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goto st8;
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st8:
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if ( ++p == pe )
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goto _test_eof8;
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case 8:
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#line 1691 "parser.c"
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#line 1696 "parser.c"
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goto st0;
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st3:
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if ( ++p == pe )
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@ -1763,7 +1768,7 @@ case 7:
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_out: {}
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}
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#line 662 "parser.rl"
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#line 667 "parser.rl"
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if (json->create_additions && RTEST(match_string = json->match_string)) {
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VALUE klass;
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@ -1960,7 +1965,7 @@ static VALUE cParser_initialize(int argc, VALUE *argv, VALUE self)
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}
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#line 1964 "parser.c"
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#line 1969 "parser.c"
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enum {JSON_start = 1};
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enum {JSON_first_final = 10};
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enum {JSON_error = 0};
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@ -1968,7 +1973,7 @@ enum {JSON_error = 0};
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enum {JSON_en_main = 1};
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#line 872 "parser.rl"
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#line 877 "parser.rl"
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/*
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@ -1986,16 +1991,16 @@ static VALUE cParser_parse(VALUE self)
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GET_PARSER;
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#line 1990 "parser.c"
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#line 1995 "parser.c"
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{
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cs = JSON_start;
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}
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#line 889 "parser.rl"
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#line 894 "parser.rl"
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p = json->source;
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pe = p + json->len;
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#line 1999 "parser.c"
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#line 2004 "parser.c"
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{
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if ( p == pe )
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goto _test_eof;
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@ -2029,7 +2034,7 @@ st0:
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cs = 0;
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goto _out;
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tr2:
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#line 864 "parser.rl"
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#line 869 "parser.rl"
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{
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char *np = JSON_parse_value(json, p, pe, &result, 0);
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if (np == NULL) { p--; {p++; cs = 10; goto _out;} } else {p = (( np))-1;}
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@ -2039,7 +2044,7 @@ st10:
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if ( ++p == pe )
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goto _test_eof10;
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case 10:
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#line 2043 "parser.c"
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#line 2048 "parser.c"
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switch( (*p) ) {
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case 13: goto st10;
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case 32: goto st10;
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@ -2128,7 +2133,7 @@ case 9:
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_out: {}
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}
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#line 892 "parser.rl"
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#line 897 "parser.rl"
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if (cs >= JSON_first_final && p == pe) {
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return result;
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@ -3,6 +3,23 @@
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#include "ruby.h"
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/* This is the fallback definition from Ruby 3.4 */
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#ifndef RBIMPL_STDBOOL_H
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#if defined(__cplusplus)
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# if defined(HAVE_STDBOOL_H) && (__cplusplus >= 201103L)
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# include <cstdbool>
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# endif
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#elif defined(HAVE_STDBOOL_H)
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# include <stdbool.h>
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#elif !defined(HAVE__BOOL)
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typedef unsigned char _Bool;
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# define bool _Bool
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# define true ((_Bool)+1)
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# define false ((_Bool)+0)
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# define __bool_true_false_are_defined
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#endif
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#endif
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#ifndef MAYBE_UNUSED
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# define MAYBE_UNUSED(x) x
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#endif
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@ -46,7 +63,7 @@ static char *JSON_parse_value(JSON_Parser *json, char *p, char *pe, VALUE *resul
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static char *JSON_parse_integer(JSON_Parser *json, char *p, char *pe, VALUE *result);
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static char *JSON_parse_float(JSON_Parser *json, char *p, char *pe, VALUE *result);
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static char *JSON_parse_array(JSON_Parser *json, char *p, char *pe, VALUE *result, int current_nesting);
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static VALUE json_string_unescape(char *string, char *stringEnd, int intern, int symbolize);
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static VALUE json_string_unescape(char *string, char *stringEnd, bool intern, bool symbolize);
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static char *JSON_parse_string(JSON_Parser *json, char *p, char *pe, VALUE *result);
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static VALUE convert_encoding(VALUE source);
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static VALUE cParser_initialize(int argc, VALUE *argv, VALUE self);
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}
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}
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static inline VALUE build_string(const char *buffer, const char *bufferStart, bool intern, bool symbolize)
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static inline VALUE build_string(const char *start, const char *end, bool intern, bool symbolize)
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{
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if (symbolize) {
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intern = true;
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@ -469,12 +469,12 @@ static inline VALUE build_string(const char *buffer, const char *bufferStart, bo
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VALUE result;
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# ifdef HAVE_RB_ENC_INTERNED_STR
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if (intern) {
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result = rb_enc_interned_str(bufferStart, (long)(buffer - bufferStart), rb_utf8_encoding());
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result = rb_enc_interned_str(start, (long)(end - start), rb_utf8_encoding());
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} else {
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result = rb_utf8_str_new(bufferStart, (long)(buffer - bufferStart));
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result = rb_utf8_str_new(start, (long)(end - start));
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}
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# else
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result = rb_utf8_str_new(bufferStart, (long)(buffer - bufferStart));
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result = rb_utf8_str_new(start, (long)(end - start));
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if (intern) {
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# if STR_UMINUS_DEDUPE_FROZEN
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// Starting from MRI 3.0 it is preferable to freeze the string
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@ -499,7 +499,7 @@ static inline VALUE build_string(const char *buffer, const char *bufferStart, bo
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}
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static const size_t MAX_STACK_BUFFER_SIZE = 128;
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static VALUE json_string_unescape(char *string, char *stringEnd, int intern, int symbolize)
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static VALUE json_string_unescape(char *string, char *stringEnd, bool intern, bool symbolize)
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{
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VALUE result = Qnil;
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size_t bufferSize = stringEnd - string;
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@ -507,6 +507,11 @@ static VALUE json_string_unescape(char *string, char *stringEnd, int intern, int
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int unescape_len;
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char buf[4];
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pe = memchr(p, '\\', bufferSize);
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if (RB_LIKELY(pe == NULL)) {
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return build_string(string, stringEnd, intern, symbolize);
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}
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if (bufferSize > MAX_STACK_BUFFER_SIZE) {
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# ifdef HAVE_RB_ENC_INTERNED_STR
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bufferStart = buffer = ALLOC_N(char, bufferSize ? bufferSize : 1);
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@ -609,7 +614,7 @@ static VALUE json_string_unescape(char *string, char *stringEnd, int intern, int
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buffer += pe - p;
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}
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result = build_string(buffer, bufferStart, intern, symbolize);
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result = build_string(bufferStart, buffer, intern, symbolize);
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if (bufferSize > MAX_STACK_BUFFER_SIZE) {
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ruby_xfree(bufferStart);
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Block a user