Examples of com.google.common.base.Stopwatch.elapsed()

com.google.common.base.Stopwatch.elapsed()
Returns the current elapsed time shown on this stopwatch, expressed in the desired time unit, with any fraction rounded down.
Note that the overhead of measurement can be more than a microsecond, so it is generally not useful to specify {@link TimeUnit#NANOSECONDS}precision here. @since 14.0 (since 10.0 as {@code elapsedTime()})

        log.debug("Partition retrieval, native table %s (%d partitions): %dms", tableHandle, tablePartitions.size(), partitionTimer.elapsed(TimeUnit.MILLISECONDS));


        Multimap<String, ? extends PartitionKey> allPartitionKeys = shardManager.getAllPartitionKeys(tableHandle);
        Map<String, ColumnHandle> columnHandles = metadata.getColumnHandles(tableHandle);


        log.debug("Partition key retrieval, native table %s (%d keys): %dms", tableHandle, allPartitionKeys.size(), partitionTimer.elapsed(TimeUnit.MILLISECONDS));


        List<Partition> partitions = ImmutableList.copyOf(Collections2.transform(tablePartitions, new PartitionFunction(columnHandles, allPartitionKeys)));


        log.debug("Partition generation, native table %s (%d partitions): %dms", tableHandle, partitions.size(), partitionTimer.elapsed(TimeUnit.MILLISECONDS));

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        log.debug("Partition key retrieval, native table %s (%d keys): %dms", tableHandle, allPartitionKeys.size(), partitionTimer.elapsed(TimeUnit.MILLISECONDS));


        List<Partition> partitions = ImmutableList.copyOf(Collections2.transform(tablePartitions, new PartitionFunction(columnHandles, allPartitionKeys)));


        log.debug("Partition generation, native table %s (%d partitions): %dms", tableHandle, partitions.size(), partitionTimer.elapsed(TimeUnit.MILLISECONDS));


        return new PartitionResult(partitions, tupleDomain);
    }


    @Override

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                Split split = new NativeSplit(entry.getKey(), addresses);
                splits.add(split);
            }
        }


        log.debug("Split retrieval for %d partitions (%d splits): %dms", partitions.size(), splits.size(), splitTimer.elapsed(TimeUnit.MILLISECONDS));


        // the query engine assumes that splits are returned in a somewhat random fashion. The native split manager,
        // because it loads the data from a db table will return the splits somewhat ordered by node id so only a sub
        // set of nodes is fired up. Shuffle the splits to ensure random distribution.
        Collections.shuffle(splits);

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            Stopwatch partitionTimer = Stopwatch.createStarted();
            PartitionResult matchingPartitions = splitManager.getPartitions(node.getTable(), Optional.of(tupleDomain));
            List<Partition> partitions = matchingPartitions.getPartitions();
            TupleDomain undeterminedTupleDomain = matchingPartitions.getUndeterminedTupleDomain();
            log.debug("Partition retrieval, table %s (%d partitions): %dms", node.getTable(), partitions.size(), partitionTimer.elapsed(TimeUnit.MILLISECONDS));


            Expression unevaluatedDomainPredicate = DomainTranslator.toPredicate(undeterminedTupleDomain, ImmutableBiMap.copyOf(node.getAssignments()).inverse());


            // Construct the post scan predicate. Add the unevaluated TupleDomain back first since those are generally cheaper to evaluate than anything we can't extract
            Expression postScanPredicate = combineConjuncts(unevaluatedDomainPredicate, extractionRemainingExpression);

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            timer.start();
            DenseMatrix A = new DenseMatrix(origA);
            timer.stop();
            // all attempts to measure memory usage failed
            denseMem = n * n * 8;
            denseInitTime = timer.elapsed(TimeUnit.NANOSECONDS);
            timer.reset();


            DenseMatrix B = origB.copy();
            DenseMatrix C = new DenseMatrix(n, n);
            timer.start();

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            DenseMatrix B = origB.copy();
            DenseMatrix C = new DenseMatrix(n, n);
            timer.start();
            A.mult(B, C);
            timer.stop();
            denseMultTime = timer.elapsed(TimeUnit.NANOSECONDS);
          }
          {
            timer.reset();
            timer.start();
            LinkedSparseMatrix A = new LinkedSparseMatrix(origA);

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            timer.start();
            LinkedSparseMatrix A = new LinkedSparseMatrix(origA);
            timer.stop();
            // using compressedooms
            sparseMem = m * 28 + 16 * n;
            sparseInitTime = timer.elapsed(TimeUnit.NANOSECONDS);
            timer.reset();


            DenseMatrix B = origB.copy();
            DenseMatrix C = new DenseMatrix(n, n);
            timer.start();

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            DenseMatrix B = origB.copy();
            DenseMatrix C = new DenseMatrix(n, n);
            timer.start();
            A.mult(B, C);
            timer.stop();
            sparseMultTime = timer.elapsed(TimeUnit.NANOSECONDS);
          }


          String[] line = new String[]{
              Integer.toString(n), Integer.toString(m),
              Long.toString(denseMem), Long.toString(denseInitTime), Long.toString(denseMultTime),

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        }
        SubSchemaWrapper wrapper = new SubSchemaWrapper(drillSchema);
        parent.add(wrapper.getName(), wrapper);
      }


      logger.debug("Took {} ms to register schemas.", watch.elapsed(TimeUnit.MILLISECONDS));
    }


  }


}

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    }


    Stopwatch watch = new Stopwatch();
    watch.start();
    root.accept(i, context);
    logger.debug("Took {} ms to accept", watch.elapsed(TimeUnit.MILLISECONDS));
    if (i.root == null)
      throw new ExecutionSetupException(
          "The provided fragment did not have a root node that correctly created a RootExec value.");
    return i.getRoot();
  }

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