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Feature #14984
closed
case when with splat operator performance
Status:
Closed
Assignee:
-
Target version:
-
Description
case when with splat operator use instructions like duparray, concatarray which result in creation of arrays.
Avoiding creation of array improves performance.
I've done following set of changes:
https://github.com/ruby/ruby/pull/1928
Which resulted into following benchmark result
Current trunk
4.648000 0.000000 4.648000 ( 4.644334)
Modified
1.900000 0.000000 1.900000 ( 1.906208)
Changes in InstructionSequence are as follow
Current trunk
disasm: #<ISeq:case_splat@../bench_when_splat.rb:17 (17,0)-(40,3)> (catch: FALSE)
local table (size: 1, argc: 1 [opts: 0, rest: -1, post: 0, block: -1, kw: -1@-1, kwrest: -1])
[ 1] i@0<Arg>
0000 getlocal_WC_0 i@0 ( 18)[LiCa]
0002 dup ( 19)
0003 getinlinecache 10, <is:0>
0006 getconstant :C0_9
0008 setinlinecache <is:0>
0010 splatarray true
0012 checkmatch 6
0014 branchif 192
0016 dup ( 21)
0017 getinlinecache 24, <is:1>
0020 getconstant :C10_18
0022 setinlinecache <is:1>
0024 splatarray true
0026 putobject 19
0028 newarray 1
0030 concatarray
0031 checkmatch 6
0033 branchif 196
0035 dup ( 23)
0036 duparray [29]
0038 getinlinecache 45, <is:2>
0041 getconstant :C20_28
0043 setinlinecache <is:2>
0045 concatarray
0046 checkmatch 6
0048 branchif 200
0050 dup ( 25)
0051 getinlinecache 58, <is:3>
0054 getconstant :C30_37
0056 setinlinecache <is:3>
0058 splatarray true
0060 duparray [38, 39]
0062 concatarray
0063 checkmatch 6
0065 branchif 204
0067 dup ( 27)
0068 duparray [48, 49]
0070 getinlinecache 77, <is:4>
0073 getconstant :C40_47
0075 setinlinecache <is:4>
0077 concatarray
0078 checkmatch 6
0080 branchif 208
0082 dup ( 29)
0083 getinlinecache 90, <is:5>
0086 getconstant :C50_56
0088 setinlinecache <is:5>
0090 splatarray true
0092 duparray [57, 58]
0094 concatarray
0095 putobject 59
0097 newarray 1
0099 concatarray
0100 checkmatch 6
0102 branchif 212
0104 dup ( 31)
0105 duparray [67, 68, 69]
0107 getinlinecache 114, <is:6>
0110 getconstant :C60_66
0112 setinlinecache <is:6>
0114 concatarray
0115 checkmatch 6
0117 branchif 216
0119 dup ( 33)
0120 getinlinecache 127, <is:7>
0123 getconstant :C70_74
0125 setinlinecache <is:7>
0127 splatarray true
0129 getinlinecache 136, <is:8>
0132 getconstant :C75_79
0134 setinlinecache <is:8>
0136 concatarray
0137 checkmatch 6
0139 branchif 220
0141 dup ( 35)
0142 getinlinecache 149, <is:9>
0145 getconstant :C80_83
0147 setinlinecache <is:9>
0149 splatarray true
0151 getinlinecache 158, <is:10>
0154 getconstant :C84_87
0156 setinlinecache <is:10>
0158 concatarray
0159 duparray [88, 89]
0161 concatarray
0162 checkmatch 6
0164 branchif 224
0166 dup ( 37)
0167 duparray [98, 99]
0169 getinlinecache 176, <is:11>
0172 getconstant :C90_93
0174 setinlinecache <is:11>
0176 concatarray
0177 getinlinecache 184, <is:12>
0180 getconstant :C94_97
0182 setinlinecache <is:12>
0184 concatarray
0185 checkmatch 6
0187 branchif 228
0189 pop ( 18)
0190 putnil
0191 leave ( 40)[Re]
0192 pop ( 19)
0193 putobject 0..9 ( 20)[Li]
0195 leave ( 40)[Re]
0196 pop ( 21)
0197 putobject 10..19 ( 22)[Li]
0199 leave ( 40)[Re]
0200 pop ( 23)
0201 putobject 20..29 ( 24)[Li]
0203 leave ( 40)[Re]
0204 pop ( 25)
0205 putobject 30..39 ( 26)[Li]
0207 leave ( 40)[Re]
0208 pop ( 27)
0209 putobject 40..49 ( 28)[Li]
0211 leave ( 40)[Re]
0212 pop ( 29)
0213 putobject 50..59 ( 30)[Li]
0215 leave ( 40)[Re]
0216 pop ( 31)
0217 putobject 60..69 ( 32)[Li]
0219 leave ( 40)[Re]
0220 pop ( 33)
0221 putobject 70..79 ( 34)[Li]
0223 leave ( 40)[Re]
0224 pop ( 35)
0225 putobject 80..89 ( 36)[Li]
0227 leave ( 40)[Re]
0228 pop ( 37)
0229 putobject 90..99 ( 38)[Li]
0231 leave ( 40)[Re]
Modified
disasm: #<ISeq:case_splat@../bench_when_splat.rb:17 (17,0)-(40,3)> (catch: FALSE)
local table (size: 1, argc: 1 [opts: 0, rest: -1, post: 0, block: -1, kw: -1@-1, kwrest: -1])
[ 1] i@0<Arg>
0000 getlocal_WC_0 i@0 ( 18)[LiCa]
0002 dup ( 19)
0003 getinlinecache 10, <is:0>
0006 getconstant :C0_9
0008 setinlinecache <is:0>
0010 splatarray false
0012 checkmatch 6
0014 branchif 299
0016 dup ( 21)
0017 getinlinecache 24, <is:1>
0020 getconstant :C10_18
0022 setinlinecache <is:1>
0024 splatarray false
0026 checkmatch 6
0028 branchif 303
0030 dup
0031 putobject 19
0033 checkmatch 2
0035 branchif 303
0037 dup ( 23)
0038 putobject 29
0040 checkmatch 2
0042 branchif 307
0044 dup
0045 getinlinecache 52, <is:2>
0048 getconstant :C20_28
0050 setinlinecache <is:2>
0052 splatarray false
0054 checkmatch 6
0056 branchif 307
0058 dup ( 25)
0059 getinlinecache 66, <is:3>
0062 getconstant :C30_37
0064 setinlinecache <is:3>
0066 splatarray false
0068 checkmatch 6
0070 branchif 311
0072 dup
0073 putobject 38
0075 checkmatch 2
0077 branchif 311
0079 dup
0080 putobject 39
0082 checkmatch 2
0084 branchif 311
0086 dup ( 27)
0087 putobject 48
0089 checkmatch 2
0091 branchif 315
0093 dup
0094 putobject 49
0096 checkmatch 2
0098 branchif 315
0100 dup
0101 getinlinecache 108, <is:4>
0104 getconstant :C40_47
0106 setinlinecache <is:4>
0108 splatarray false
0110 checkmatch 6
0112 branchif 315
0114 dup ( 29)
0115 getinlinecache 122, <is:5>
0118 getconstant :C50_56
0120 setinlinecache <is:5>
0122 splatarray false
0124 checkmatch 6
0126 branchif 319
0128 dup
0129 putobject 57
0131 checkmatch 2
0133 branchif 319
0135 dup
0136 putobject 58
0138 checkmatch 2
0140 branchif 319
0142 dup
0143 putobject 59
0145 checkmatch 2
0147 branchif 319
0149 dup ( 31)
0150 putobject 67
0152 checkmatch 2
0154 branchif 323
0156 dup
0157 putobject 68
0159 checkmatch 2
0161 branchif 323
0163 dup
0164 putobject 69
0166 checkmatch 2
0168 branchif 323
0170 dup
0171 getinlinecache 178, <is:6>
0174 getconstant :C60_66
0176 setinlinecache <is:6>
0178 splatarray false
0180 checkmatch 6
0182 branchif 323
0184 dup ( 33)
0185 getinlinecache 192, <is:7>
0188 getconstant :C70_74
0190 setinlinecache <is:7>
0192 splatarray false
0194 checkmatch 6
0196 branchif 327
0198 dup
0199 getinlinecache 206, <is:8>
0202 getconstant :C75_79
0204 setinlinecache <is:8>
0206 splatarray false
0208 checkmatch 6
0210 branchif 327
0212 dup ( 35)
0213 getinlinecache 220, <is:9>
0216 getconstant :C80_83
0218 setinlinecache <is:9>
0220 splatarray false
0222 checkmatch 6
0224 branchif 331
0226 dup
0227 getinlinecache 234, <is:10>
0230 getconstant :C84_87
0232 setinlinecache <is:10>
0234 splatarray false
0236 checkmatch 6
0238 branchif 331
0240 dup
0241 putobject 88
0243 checkmatch 2
0245 branchif 331
0247 dup
0248 putobject 89
0250 checkmatch 2
0252 branchif 331
0254 dup ( 37)
0255 putobject 98
0257 checkmatch 2
0259 branchif 335
0261 dup
0262 putobject 99
0264 checkmatch 2
0266 branchif 335
0268 dup
0269 getinlinecache 276, <is:11>
0272 getconstant :C90_93
0274 setinlinecache <is:11>
0276 splatarray false
0278 checkmatch 6
0280 branchif 335
0282 dup
0283 getinlinecache 290, <is:12>
0286 getconstant :C94_97
0288 setinlinecache <is:12>
0290 splatarray false
0292 checkmatch 6
0294 branchif 335
0296 pop ( 18)
0297 putnil
0298 leave ( 40)[Re]
0299 pop ( 19)
0300 putobject 0..9 ( 20)[Li]
0302 leave ( 40)[Re]
0303 pop ( 21)
0304 putobject 10..19 ( 22)[Li]
0306 leave ( 40)[Re]
0307 pop ( 23)
0308 putobject 20..29 ( 24)[Li]
0310 leave ( 40)[Re]
0311 pop ( 25)
0312 putobject 30..39 ( 26)[Li]
0314 leave ( 40)[Re]
0315 pop ( 27)
0316 putobject 40..49 ( 28)[Li]
0318 leave ( 40)[Re]
0319 pop ( 29)
0320 putobject 50..59 ( 30)[Li]
0322 leave ( 40)[Re]
0323 pop ( 31)
0324 putobject 60..69 ( 32)[Li]
0326 leave ( 40)[Re]
0327 pop ( 33)
0328 putobject 70..79 ( 34)[Li]
0330 leave ( 40)[Re]
0331 pop ( 35)
0332 putobject 80..89 ( 36)[Li]
0334 leave ( 40)[Re]
0335 pop ( 37)
0336 putobject 90..99 ( 38)[Li]
0338 leave ( 40)[Re]
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