Projects‎ > ‎USDS‎ > ‎

Benchmark tests

All tests were performed on the same computer (Intel Core i5-4440 3.1 GHz, DDR3 12 GB) with the same compiler configuration (optimization - maximum performance), in one thread. The test performs multiple serialization and deserialization of the data structure. The test were performed several times to obtain the an average time.

The source code is provided here.

The following data structures were used:

class TicketSales
    int shiftNumber;
    int cashRegister;
    time_t startShift;
    time_t endShift;
    voucher* vouchers;
    int numVouchers;

struct voucher
    int voucher_number;
    double summ;
    char goods_name[128];
    time_t time_of_sell;
    bool status;
The first test includes the array "vouchers", containing two elements "voucher"; the amount of useful data is 92 bytes. In the second test, the array’s size is 1000 elements and the amount of useful data is 35,890 bytes. The tests results are shown below. The source code can be provided upon request.

Test Results

Test 1: 92 bytes of useful data, 1,000,000 passes
The gadget spec URL could not be found

Test 2: 35890 bytes of useful data, 10,000 passes
The gadget spec URL could not be found

Comments to the Tests


The next dictionary was prepared for the USDS test:

USDS Dictionary

    1: STRUCT I
        1: UNSIGNED VARINT n;
        2: DOUBLE s;
        3: STRING<UTF-8> g;
        4: LONG t;
        5: BOOLEAN b;
    } RESTRICT {root=false;}

    2: STRUCT S
        1: UNSIGNED VARINT n;
        2: INT m;
        3: LONG s;
        4: LONG e;
        5: ARRAY<I> v;

The same names for tags and fields were used in XML, JSON and BSON testes. The same data types were used in Protobuf test.

SAX parser is twice faster then DOM parser, but it requires more efforts from developers.

Protobuf 2

The next proto-file was prepared for Protobuf test:

Protobuf 2

message ProtobufTicketSales
    required int32 ShiftNumber = 1;
    required fixed32 CashRegister = 2;
    required fixed64 start_Shift = 3;
    required fixed64 end_Shift = 4;

message ProtobufVoucher

        required int32 voucher_number = 1;
        required double summ = 2;
        required string goods_name = 3;
        required fixed64 time_of_sell = 4;
        required bool status = 5;
    repeated ProtobufVoucher vouchers = 5;

The parser works very quickly. USDS DOM parser works quicker only because the pattern "Object pull" is used. In theory, Protobuf parser can work with the same speed.


The next result was received from JSON parser:


{   "T":
        "s":"1970.04.13 23:49:36",
        "e":"1970.04.14 00:26:39",
            {"u":0,"m":0.0,"g":"Goods ID is 0","t":"1970.01.01 03:00:00","b":true},
            {"u":1,"m":1.0,"g":"Goods ID is 1","t":"1970.01.01 03:00:01","b":false}

Rapidjson SAX parser works relatively quickly, but it's required a lot of efforts from developer: it's very difficult to debug source code.


The next result was received from XML parser:


    <S n="1234" r="9992828" s="1970.04.13 23:49:36" e="1970.04.14 00:26:39"/>
        <I n="0" s="0" g="Goods ID is 0" t="1970.01.01 03:00:00" b="1"/>
        <I n="1" s="1" g="Goods ID is 1" t="1970.01.01 03:00:01" b="0"/>

It's very simple to integrate the library TiniXML2 to the project but it works too slowly.


The result of BSON parser is binary data, but it can be represented as the next JSON object:


    "T" :
        "n" : 1234,
        "r" : 9992828,
        "s" : { "$numberLong" : "8887776" },
        "e" : { "$numberLong" : "8889999" },
        "V" :
            { "u" : 0, "s" : 0, "g" : "Goods ID is 0", "t" : { "$numberLong" : "0" }, "b" : true },
            { "u" : 1, "s" : 1, "g": "Goods ID is 1", "t" : { "$numberLong" : "1" }, "b" : false }

BSON parser works slower then USDS and Protobuf because it uses text names for keys.


The next rule-file was prepared for ASN.1 test:


    AsnVoucher ::= SEQUENCE {
    voucherNumber INTEGER,
    summ REAL,
    goodsName UTF8String,
    timeOfSell UTCTime,
    status BOOLEAN

AsnTicketSales ::= SEQUENCE
    shiftNumber INTEGER,
    cashRegister INTEGER,
    startShift UTCTime,
    endShift UTCTime,
    vouchers SEQUENCE OF AsnVoucher

The parser was tested in BER, PER, OER and XER formats. XER is slowest because it's based on XML. The result from XER parser represented below:


<?xml version="1.0" encoding="UTF-8"?>
            <goodsName>Goods ID is 0</goodsName>
            <goodsName>Goods ID is 1</goodsName>

All ASN.1 parsers work slow, perhaps it's related to trial-license. In theory, ASN.1 parser can work as fast as USDS and Protobuf.

2015.11.03 Andrey Abramov
CC BY 4.0


The gadget spec URL could not be found