arnaudroger
/ SampleReadingOneLine.java
Last active
September 27, 2019 08:57
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| import org.simpleflatmapper.csv.CsvMapper; | |
| import org.simpleflatmapper.csv.CsvMapperFactory; | |
| import org.simpleflatmapper.csv.CsvParser; | |
| import org.simpleflatmapper.lightningcsv.CsvReader; | |
| import java.io.IOException; | |
| public class SampleReadingOneLine { | |
| private static final CsvMapper<MyObject> mapper = |
arnaudroger
/ loop_no_safepoint.asm
Created
February 6, 2019 15:11
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| 0x00007fe6ecc85730: mov (%r10),%r11d ;*invokestatic access$100 {reexecute=0 rethrow=0 return_oop=0} | |
| ; - com.rapid7.odin.netty.NettyMessageConsumer$ScheduleProcess::run@4 (line 236) | |
| ; - com.rapid7.odin.netty.util.WriteTaskScheduler$WriteTask::run@11 (line 102) | |
| ; - io.netty.util.concurrent.AbstractEventExecutor::safeExecute@1 (line 163) | |
| ; - io.netty.util.concurrent.SingleThreadEventExecutor::runAllTasks@31 (line 404) | |
| 0x00007fe6ecc85733: test %r11d,%r11d | |
| 0x00007fe6ecc85736: je 0x00007fe6ecc85730 |
arnaudroger
/ SafepointBug_java11.asm
Created
January 30, 2019 17:24
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| # {method} {0x00000001282303f8} 'poll' '()Ljava/lang/Object;' in 'org/jctools/queues/BaseMpscLinkedArrayQueue' | |
| # [sp+0x70] (sp of caller) | |
| [Entry Point] | |
| 0x00000001186d03e0: mov 0x8(%rsi),%r10d | |
| 0x00000001186d03e4: movabs $0x800000000,%r12 | |
| 0x00000001186d03ee: add %r12,%r10 | |
| 0x00000001186d03f1: xor %r12,%r12 | |
| 0x00000001186d03f4: cmp %r10,%rax | |
| 0x00000001186d03f7: jne 0x0000000110c24c80 ; {runtime_call ic_miss_stub} | |
| 0x00000001186d03fd: data16 xchg %ax,%ax |
arnaudroger
/ SafepointBug_java8.asm
Last active
January 30, 2019 17:24
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| # {method} {0x00000001206a6320} 'poll' '()Ljava/lang/Object;' in 'org/jctools/queues/BaseMpscLinkedArrayQueue' | |
| # [sp+0x30] (sp of caller) | |
| [Entry Point] | |
| 0x0000000108427ee0: mov 0x8(%rsi),%r10d | |
| 0x0000000108427ee4: shl $0x3,%r10 | |
| 0x0000000108427ee8: cmp %r10,%rax | |
| 0x0000000108427eeb: jne 0x00000001082e6ba0 ; {runtime_call} | |
| 0x0000000108427ef1: data16 xchg %ax,%ax | |
| 0x0000000108427ef4: nopl 0x0(%rax,%rax,1) | |
| 0x0000000108427efc: data16 data16 xchg %ax,%ax |
arnaudroger
/ SafepointBug.java
Created
January 30, 2019 17:21
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| import org.jctools.queues.MpscUnboundedArrayQueue; | |
| import java.util.concurrent.TimeUnit; | |
| import java.util.concurrent.locks.LockSupport; | |
| public class Main { | |
| public static final long HEALTH_INT = TimeUnit.SECONDS.toNanos(1); |
arnaudroger
/ CsvToJsonNoString.java
Last active
June 4, 2019 18:06
How to Convert CSV to JSON in Java low garbage
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| import com.fasterxml.jackson.core.JsonFactory; | |
| import com.fasterxml.jackson.core.JsonGenerator; | |
| import org.simpleflatmapper.csv.CsvParser; | |
| import org.simpleflatmapper.csv.CsvReader; | |
| import org.simpleflatmapper.csv.parser.CellConsumer; | |
| import org.simpleflatmapper.util.ErrorHelper; | |
| import java.io.IOException; | |
| import java.util.ArrayList; | |
| import java.util.List; |
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| import com.fasterxml.jackson.core.JsonFactory; | |
| import com.fasterxml.jackson.core.JsonGenerator; | |
| import org.simpleflatmapper.csv.CsvParser; | |
| import org.simpleflatmapper.csv.CsvReader; | |
| import java.io.IOException; | |
| import java.util.Iterator; | |
| // uses http://simpleflatmapper.org/0101-getting-started-csv.html for csv parser | |
| // and jackson-core for JsonGenerator |