Improve JSON Performance

Transcript

1. *NQSPWF
   +40/
   1FSGPSNBODF Shizuo Fujita
2. Self @watson1978 Ubiregi Inc. Ruby committer
3. JSON.parse()
5. Parsed Hash object require 'json' json =<<'END' { "id": 1, "uuid": "ede84c89-3e5a-4025-a8d4-8c66cfed1820", "created_at": "2018-05-27 22:54:55 +0900" } END JSON.parse(json) # => {"id"=>1, # "uuid"=>"ede84c89-3e5a-4025-a8d4-8c66cfed1820", # "created_at"=>"2018-05-27 22:54:55 +0900"} Hash object has String keys.
6. Hash freezes string key Duplicate and freeze the string if it isn’t frozen…
7. Remove redundant duplication Hash#[]= with frozen string key, you can remove redundant duplication of string in internally
8. Benchmark obj = [] 1000.times do |i| obj << { "id": i, "uuid": SecureRandom.uuid, "created_at": Time.now } end json = obj.to_json Benchmark.ips do |x| x.report("json") { JSON.parse(json) } x.report("yajl") { Yajl::Parser.parse(json) } x.report("oj") { Oj.load(json) } end
9.      KTPO
   CFGPSF ZBKM KTPO
   BGUFS PK     
   VQ Before After
10. JSON.generate() (i.e. Object#to_json)
12. 1. Remove redundant converting array = hash.keys array.each do |key| value = hash[key] ... end hash.each do |key, value| ... end Before After Here is pseudo code…
13. 2. Add shortcut for converting to String for Hash key Before it always convert Object to String using #to_s via rb_funcall(). After It convert with appropriate CRuby-API if necessary.
14. 3. Call CRuby-API instead of rb_funcall rb_funcall() is slightly heavy to call the Ruby method. It is better performance to use rb_str_encode() API instead.
15. 4. Convert encoding only when needed If String object has only ASCII characters, it might not need to convert encoding.
16. Benchmark obj = [] 1000.times do |i| obj << { "id" => i, :age => 42, :name => "Foo Bar Baz" } end Benchmark.ips do |x| x.report("json") { JSON.generate(obj) } x.report("yajl") { Yajl::Encoder.encode(obj, nil) } x.report("oj") { Oj.dump(obj) } end
17.      KTPO
    CFGPSF ZBKM KTPO
    BGUFS PK     Y
    VQ Before After
18. ⚠
19. Not merged, No reaction Can you help me? https://github.com/flori/json/pull/345 https://github.com/flori/json/pull/346
20. Thank you !!!