reverse-complement Dart #2 program

/* The Computer Language Benchmarks Game
   https://salsa.debian.org/benchmarksgame-team/benchmarksgame/

   Contributed by James Wendel
*/

import 'dart:io';

void main() {
  var src   = "CGATMKRYVBHD";
  var dst   = "GCTAKMYRBVDH";
  var tbl   = new List<int>(256);
  var seq   = new List<int>();
  
  // Set up lookup table
  for (int i = 0; i < tbl.length; i++)
    tbl[i] = i;
  
  for (int i = 0; i < src.length; i++) {
    tbl[src.codeUnitAt(i)]                = dst.codeUnitAt(i);
    tbl[src.toLowerCase().codeUnitAt(i)]  = dst.codeUnitAt(i);
  }

  var buffer = new List<int>(60);
  List<int> list = new List<int>();
  bool commentLine = false;
  StringBuffer sbuf = new StringBuffer();
   
  stdin.listen((List<int> dataList) {
    // Loop over all the contents of the buffer so far
    for (int data in dataList) {
      
      // Check if this is a comment line (and that we aren't already on a comment line)
      if (data == 62 && !commentLine) {
        int count = 0;
        
        // Print the reverse components for the last block 
        for (int g in list.reversed) {
          if (count == 60) {
            sbuf.write(new String.fromCharCodes(buffer.getRange(0, count)));
            sbuf.write('\n');
            count=0;
          } 
          buffer[count++] = g;
        }
        // Print any stragling data
        if (count > 0) {
          sbuf.write(new String.fromCharCodes(buffer.getRange(0, count)));
          sbuf.write('\n');
        }
        // Reset the data for the begining of a block of data
        list.clear();
        commentLine = true;
      } 
        
      if (commentLine) {
        if (data == 10) {
          sbuf.write(new String.fromCharCodes(list));
          print(sbuf);
          sbuf = new StringBuffer();
          commentLine = false;
          list.clear();
        } else {
          list.add(data);
        }
      } else if (data != 10) {
          // Add the complement to the buffer
          list.add(tbl[data]);
      }
    }
  }).onDone(() {
    // Print out anything remaining in the buffers
    if (commentLine) {
      sbuf.write(new String.fromCharCodes(list));
    } else {
      int count = 0;
      for (int data in list.reversed) {
        if (count == 60) {
          sbuf.write(new String.fromCharCodes(buffer.getRange(0, count)));
          sbuf.write('\n');
          count=0;
        } 
        buffer[count++] = data;
      }
      if (count > 0) {
        sbuf.write(new String.fromCharCodes(buffer.getRange(0, count)));
      }
    }
    print(sbuf);
  });
}
    

NOTES:
64-bit Ubuntu quad core
Dart VM version: 2.8.1 (stable) (Unknown timestamp) on "linux_x64"


Wed, 06 May 2020 20:15:57 GMT

MAKE:
/usr/bin/dartanalyzer revcomp.dart-2.dart
make: /usr/bin/dartanalyzer: Command not found
make: [/home/dunham/8000-benchmarksgame/nanobench/makefiles/u64q.programs.Makefile:445: revcomp.dart-2.dart_run] Error 127 (ignored)

0.13s to complete and log all make actions

COMMAND LINE:
/usr/bin/dart --old_gen_heap_size=3072 revcomp.dart-2.dart 0 < revcomp-input100000000.txt

PROGRAM FAILED 


PROGRAM OUTPUT:
>ONE Homo sapiens alu

Exhausted heap space, trying to allocate 2147483664 bytes.
Unhandled exception:
Out of Memory
#0      List._allocateData (dart:core-patch/growable_array.dart)
#1      List._grow (dart:core-patch/growable_array.dart:250:19)
#2      main.<anonymous closure> (file:///home/dunham/benchmarksgame_quadcore/revcomp/tmp/revcomp.dart-2.dart:93:2229)
#3      _RootZone.runUnaryGuarded (dart:async/zone.dart:1374:10)
#4      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:339:11)
#5      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:266:7)
#6      _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:779:19)
#7      _StreamController._add (dart:async/stream_controller.dart:655:7)
#8      _StreamController.add (dart:async/stream_controller.dart:597:5)
#9      _FileStream._readBlock.<anonymous closure> (dart:io/file_impl.dart:105:19)
#10     _RootZone.runUnary (dart:async/zone.dart:1439:54)
#11     _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
#12     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
#13     Future._propagateToListeners (dart:async/future_impl.dart:711:32)
#14     Future._completeWithValue (dart:async/future_impl.dart:526:5)
#15     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:556:7)
#16     _microtaskLoop (dart:async/schedule_microtask.dart:43:21)
#17     _startMicrotaskLoop (dart:async/schedule_microtask.dart:52:5)
#18     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
#19     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5)