2022 version of stronger jsonpath compatibility and performance test (snack3, fastjson2, jayway.jsonpath)

2022 Years. , Made a new one json path Compatibility and performance test . Comparative testing of three popular frameworks in the market .

disclaimer ： Maybe the wrong way to test results in unscientific results （ in addition , Different machines will have different results ）, You can point it out in a message . The following test values are only valid for my computer （ To configure ：Macbook pro 13 2020 paragraph i7+32G+1T）.

The three frameworks and versions used in the test of this case ：

• com.alibaba.fastjson2:fastjson2:2.0.4
• com.jayway.jsonpath:json-path:2.2.0
• org.noear:snack3:3.2.31

Three samples of test data ：

• A:{code:1,msg:'Hello world',data:{list:[1,2,3,4,5], ary2:[{a:2},{a:3,b:{c:'ddd'}}]}}
• B:[{b:{c:1}}, {b:{d:1}}, {b:{c:2}}, {b:{c:23}}]
• C:[{c:'aaaa'}, {b:'cccc'}, {c:'cccaa'}]

Test plan ：

1. Test pseudo code

var text = "...";

//1. Pre parse json
var obj = JSON.parse(text);

long start = System.currentTimeMillis();
for(int i=0,len=1000000; i<len; i++) {
    //2. perform json path
    JSONPath.eval(obj,"$..."); 
}
//3.100 Ten thousand times of consuming time （ That's the number recorded ）
long times = System.currentTimeMillis() - start;

System.out.println(times);

2. Every frame 、 Each expression executes 4 Time , And record it 3 Time consuming

3. Finally, make a comparison table

4. test result ：

Json path expression	data	fastjson2	json-path	snack3
$..a	A	872,764,715	2658,2633,2590	225,225,232
$..*	A	( Are not compatible 1)	3227,3220,3156	306,315,325
$.data.list[1,4]	A	577,524,419	782,798,776	133,137,131
$.data.list[1:4]	A	332,367,391	941,899,947	143,145,146
$.data.ary2[1].a	A	315,339,329	704,663,655	84,86,80
$.data.ary2[*].b.c	A	642,645,660	1105,1025,1050	239,235,237
$..b[?(@.c == 12)]	B	( Are not compatible 2)	5628,5739,5636	580,535,532
$..c.min()	B	( Are not compatible 2)	( Are not compatible 2)	279,282,285
$[?(@.c =~ /a+/)]	C	( Are not compatible 2)	3575,3591,3813	444,423,429
$..ary2[0].a	A	735,728,736	2522,2551,2591	310,311,314
$.data.list[?(@ in $..ary2[0].a)]	A	( Are not compatible 2)	5494,5326,5483	678,674,667

notes ：

• Are not compatible 1 : Returns an empty array directly
• Are not compatible 2 : Direct anomaly

summary

• fastjson2 Poor compatibility
• json-path Poor performance , Functions are limited
• snack3 Best performance , Support two strategies ：1. The standard model , Keep up with json-path Compatible effects ;2. Non standard mode , Functions have more room to use

attach 1：snack3 Project address ：

• https://github.com/noear/snack3
• https://gitee.com/noear/snack3

attach 2：.. And function expression compatibility

json-path：（snack3 The standard model is the same as ）, The strategy is as follows ：

1. The order in which the selectors are executed ：（ The expressions in parentheses are processed and then aggregated ）
   • $..(ary2[0].a)
   • $..(c.min()) // If c Is not an array , There will be an error here
   • $..(ary2[0][0])
2. Can only ：data.list[?(@ in $..ary2[0].a)]
3. Can only ： Execute the function on the original array node

snack3：（snack3 The nonstandard model of ）, The strategy is as follows ：

1. The order in which the selectors are executed ：（ The expressions in parentheses are processed and then aggregated ）

   • ($..ary2[0]).a
   • ($..c).min() //c Is the array normal // In practice , This will be more convenient , Also compatible with other expressions
   • ($..ary2[0])[0] // This will lead to different results // But in practice, there are very few

2. Sure ：data.list[?(@ in $..ary2[0].a)] or data.list[?(@ == $..ary2[0].a[0])]

3. Sure ： Execute the function on the original array node or Execute on query results

attach 3： Test code

• com.alibaba.fastjson2:fastjson2 Test code ：https://gitee.com/noear/snack3/blob/master/snack3_demo/src/test/java/benchmark/jsonpath/SpeedFastjson2JsonPathTest.java
• com.jayway.jsonpath:json-path Test code ：https://gitee.com/noear/snack3/blob/master/snack3_demo/src/test/java/benchmark/jsonpath/SpeedJaywayJsonPathTest.java
• org.noear:snack3 Test code ：https://gitee.com/noear/snack3/blob/master/snack3_demo/src/test/java/benchmark/jsonpath/SpeedJsonPathTest.java