Github user keith-turner commented on the issue:
https://github.com/apache/accumulo/pull/257
@joshelser I used the following script to run some performance test locally
using [Uno](https://github.com/astralway/uno). I didn't bother computing
stats, but there is definitely an observable performance improvement (and no
degradation). That's pretty cool to see, because the performance test run
earlier were targeted to just the iterator stack. This is showing improvements
in an end to end test.
```bash
#! /usr/bin/env bash
eval "$(./bin/uno env)"
accumulo shell -u root -p secret -e 'createtable test_ingest'
accumulo org.apache.accumulo.test.TestIngest -i uno -u root -p secret
--timestamp 1 --size 50 --random 56 --rows 1000000 --start 0 --cols 1 &
accumulo org.apache.accumulo.test.TestIngest -i uno -u root -p secret
--timestamp 1 --size 50 --random 56 --rows 1000000 --start 1000000 --cols 1 &
accumulo org.apache.accumulo.test.TestIngest -i uno -u root -p secret
--timestamp 1 --size 50 --random 56 --rows 1000000 --start 2000000 --cols 1 &
accumulo org.apache.accumulo.test.TestIngest -i uno -u root -p secret
--timestamp 1 --size 50 --random 56 --rows 1000000 --start 3000000 --cols 1 &
accumulo org.apache.accumulo.test.TestIngest -i uno -u root -p secret
--timestamp 1 --size 50 --random 56 --rows 1000000 --start 4000000 --cols 1 &
wait
accumulo shell -u root -p secret -e 'compact -t test_ingest -w'
for run in {1..10}
do
accumulo org.apache.accumulo.test.VerifyIngest -i uno -u root -p secret
--size 50 --timestamp 1 --random 56 --rows 5000000 --start 0 --cols 1
done
```
Below are the results for 1.7.3
```
5,000,000 records read | 390,502 records/sec | 395,000,000 bytes read
| 30,849,734 bytes/sec | 12.804 secs
5,000,000 records read | 411,861 records/sec | 395,000,000 bytes read
| 32,537,067 bytes/sec | 12.140 secs
5,000,000 records read | 424,268 records/sec | 395,000,000 bytes read
| 33,517,182 bytes/sec | 11.785 secs
5,000,000 records read | 428,338 records/sec | 395,000,000 bytes read
| 33,838,773 bytes/sec | 11.673 secs
5,000,000 records read | 427,350 records/sec | 395,000,000 bytes read
| 33,760,683 bytes/sec | 11.700 secs
5,000,000 records read | 428,228 records/sec | 395,000,000 bytes read
| 33,830,078 bytes/sec | 11.676 secs
5,000,000 records read | 427,606 records/sec | 395,000,000 bytes read
| 33,780,894 bytes/sec | 11.693 secs
5,000,000 records read | 427,606 records/sec | 395,000,000 bytes read
| 33,780,894 bytes/sec | 11.693 secs
5,000,000 records read | 431,816 records/sec | 395,000,000 bytes read
| 34,113,481 bytes/sec | 11.579 secs
5,000,000 records read | 414,250 records/sec | 395,000,000 bytes read
| 32,725,766 bytes/sec | 12.070 secs
```
Below are the results for this branch
```
5,000,000 records read | 408,563 records/sec | 395,000,000 bytes read
| 32,276,515 bytes/sec | 12.238 secs
5,000,000 records read | 426,657 records/sec | 395,000,000 bytes read
| 33,705,947 bytes/sec | 11.719 secs
5,000,000 records read | 447,027 records/sec | 395,000,000 bytes read
| 35,315,154 bytes/sec | 11.185 secs
5,000,000 records read | 442,830 records/sec | 395,000,000 bytes read
| 34,983,615 bytes/sec | 11.291 secs
5,000,000 records read | 446,388 records/sec | 395,000,000 bytes read
| 35,264,708 bytes/sec | 11.201 secs
5,000,000 records read | 445,990 records/sec | 395,000,000 bytes read
| 35,233,253 bytes/sec | 11.211 secs
5,000,000 records read | 435,957 records/sec | 395,000,000 bytes read
| 34,440,666 bytes/sec | 11.469 secs
5,000,000 records read | 442,869 records/sec | 395,000,000 bytes read
| 34,986,713 bytes/sec | 11.290 secs
5,000,000 records read | 439,521 records/sec | 395,000,000 bytes read
| 34,722,222 bytes/sec | 11.376 secs
5,000,000 records read | 424,592 records/sec | 395,000,000 bytes read
| 33,542,798 bytes/sec | 11.776 secs
```
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