jackson object-mapper custom SimpleDateFormat vs FastDateFormat Benchmark

Purpose

Compare different ways to customize date deserializer for objectMapper. One case is not thread-safe and generates incorrect dates.

Definitions

• SDF = SimpleDateFormat
• FDF = FastDateFormat

Evaluate alternatives are

• SDF: objectMapper using setDateFormat with SDF.
• SDF by WRAPPER - NOT CLONE (not thread-safe!): objectMapper using setDateFormat with a DateFormat wrapper using SDF, with wrong clone implemtation.
• SDF by WRAPPER - FULL CLONE: objectMapper using setDateFormat with a DateFormat wrapper using SDF.
• FDF by WRAPPER: objectMapper using setDateFormat with a DateFormat wrapper using FDF.
• withCustomDateDeserializer (FDF): objectMapper using a custom module that defines a date deserializer with FDF.

Technology

• maven
• j11

Test

mvn install

java -jar ./target/omd-jar-with-dependencies.jar

java -jar ./target/omd-jar-with-dependencies.jar {sample_size} {pool_thread_size}