anchor.diff:  library services.common_server;
   
   import 'dart:async';
  +import 'dart:convert';
   
   import 'package:crypto/crypto.dart';
   import 'package:logging/logging.dart';
  
positive.code:             counter.increment("Compilations");
              counter.increment("Compiled-Lines", increment: lineCount);
              String out = results.getOutput();
              return setCache("%%COMPILE:$sourceHash", out).then((_) {
                return new CompileResponse.fromResponse(out,
                    returnSourceMap ? results.getSourceMap() : null);
              });
            } else {
              List problems = _filterCompileProblems(results.problems);
              if (problems.isEmpty) problems = results.problems;
  
negative.code:     bool suppressCache = trimSrc.endsWith("/** Supress-Memcache **/") ||
          trimSrc.endsWith("/** Suppress-Memcache **/");
  
      String memCacheKey =
        "%%COMPILE:v0:useCheckedMode:$useCheckedMode"
        "returnSourceMap:$returnSourceMap:"
        "source:$sourceHash";
  
      return checkCache(memCacheKey).then((String result) {
        if (!suppressCache && result != null) {
          _logger.info("CACHE: Cache hit for compile");
          var resultObj = new JsonDecoder().convert(result);
          return new CompileResponse.fromResponse(resultObj["output"],
            returnSourceMap ? resultObj["sourceMap"] : null);
        } else {
          _logger.info("CACHE: MISS, forced: $suppressCache");
          Stopwatch watch = new Stopwatch()..start();
  