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Minor improvement for .batch and .multi for small values
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Improve the speed by round about 5% for small values

Add Multi.exec_atomic
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Ruben Bridgewater committed Oct 12, 2015
1 parent ed2fc95 commit f0e28bf
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Showing 6 changed files with 216 additions and 135 deletions.
105 changes: 56 additions & 49 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -491,8 +491,15 @@ client.multi([
console.log(replies);
});
```

### Multi.exec_atomic( callback )

Identical to Multi.exec but with the difference that executing a single command will not use transactions.

## client.batch([commands])

Identical to .multi without transactions. This is recommended if you want to execute many commands at once but don't have to rely on transactions.

`BATCH` commands are queued up until an `EXEC` is issued, and then all commands are run atomically by
Redis. The interface in `node_redis` is to return an individual `Batch` object by calling `client.batch()`.
The only difference between .batch and .multi is that no transaction is going to be used.
Expand Down Expand Up @@ -643,55 +650,55 @@ Here are results of `multi_bench.js` which is similar to `redis-benchmark` from
hiredis parser (Lenovo T450s i7-5600U):

Client count: 5, node version: 4.1.2, server version: 3.0.3, parser: hiredis
PING, 1/5 min/max/avg/p95: 0/ 5/ 0.03/ 0.00 1537ms total, 32530.90 ops/sec
PING, 50/5 min/max/avg/p95: 0/ 4/ 0.49/ 1.00 491ms total, 101832.99 ops/sec
PING, batch 50/5 min/max/avg/p95: 0/ 2/ 0.17/ 1.00 178ms total, 280898.88 ops/sec
SET 4B str, 1/5 min/max/avg/p95: 0/ 2/ 0.03/ 0.00 1400ms total, 35714.29 ops/sec
SET 4B str, 50/5 min/max/avg/p95: 0/ 3/ 0.61/ 1.00 610ms total, 81967.21 ops/sec
SET 4B str, batch 50/5 min/max/avg/p95: 0/ 1/ 0.19/ 1.00 198ms total, 252525.25 ops/sec
SET 4B buf, 1/5 min/max/avg/p95: 0/ 3/ 0.05/ 0.00 2349ms total, 21285.65 ops/sec
SET 4B buf, 50/5 min/max/avg/p95: 0/ 5/ 1.63/ 3.00 1632ms total, 30637.25 ops/sec
SET 4B buf, batch 50/5 min/max/avg/p95: 0/ 1/ 0.37/ 1.00 366ms total, 136612.02 ops/sec
GET 4B str, 1/5 min/max/avg/p95: 0/ 3/ 0.03/ 0.00 1348ms total, 37091.99 ops/sec
GET 4B str, 50/5 min/max/avg/p95: 0/ 3/ 0.51/ 1.00 513ms total, 97465.89 ops/sec
GET 4B str, batch 50/5 min/max/avg/p95: 0/ 1/ 0.18/ 1.00 177ms total, 282485.88 ops/sec
GET 4B buf, 1/5 min/max/avg/p95: 0/ 3/ 0.03/ 0.00 1336ms total, 37425.15 ops/sec
GET 4B buf, 50/5 min/max/avg/p95: 0/ 4/ 0.52/ 1.00 525ms total, 95238.10 ops/sec
GET 4B buf, batch 50/5 min/max/avg/p95: 0/ 1/ 0.18/ 1.00 177ms total, 282485.88 ops/sec
SET 4KiB str, 1/5 min/max/avg/p95: 0/ 2/ 0.03/ 0.00 1674ms total, 29868.58 ops/sec
SET 4KiB str, 50/5 min/max/avg/p95: 0/ 3/ 0.77/ 1.00 775ms total, 64516.13 ops/sec
SET 4KiB str, batch 50/5 min/max/avg/p95: 0/ 3/ 0.50/ 1.00 500ms total, 100000.00 ops/sec
SET 4KiB buf, 1/5 min/max/avg/p95: 0/ 2/ 0.05/ 0.00 2410ms total, 20746.89 ops/sec
SET 4KiB buf, 50/5 min/max/avg/p95: 0/ 5/ 1.64/ 3.00 1643ms total, 30432.14 ops/sec
SET 4KiB buf, batch 50/5 min/max/avg/p95: 0/ 1/ 0.41/ 1.00 409ms total, 122249.39 ops/sec
GET 4KiB str, 1/5 min/max/avg/p95: 0/ 2/ 0.03/ 0.00 1422ms total, 35161.74 ops/sec
GET 4KiB str, 50/5 min/max/avg/p95: 0/ 4/ 0.68/ 1.00 680ms total, 73529.41 ops/sec
GET 4KiB str, batch 50/5 min/max/avg/p95: 0/ 2/ 0.39/ 1.00 391ms total, 127877.24 ops/sec
GET 4KiB buf, 1/5 min/max/avg/p95: 0/ 1/ 0.03/ 0.00 1420ms total, 35211.27 ops/sec
GET 4KiB buf, 50/5 min/max/avg/p95: 0/ 4/ 0.68/ 1.00 681ms total, 73421.44 ops/sec
GET 4KiB buf, batch 50/5 min/max/avg/p95: 0/ 2/ 0.39/ 1.00 387ms total, 129198.97 ops/sec
INCR, 1/5 min/max/avg/p95: 0/ 2/ 0.03/ 0.00 1334ms total, 37481.26 ops/sec
INCR, 50/5 min/max/avg/p95: 0/ 4/ 0.51/ 1.00 513ms total, 97465.89 ops/sec
INCR, batch 50/5 min/max/avg/p95: 0/ 1/ 0.18/ 1.00 179ms total, 279329.61 ops/sec
LPUSH, 1/5 min/max/avg/p95: 0/ 2/ 0.03/ 0.00 1351ms total, 37009.62 ops/sec
LPUSH, 50/5 min/max/avg/p95: 0/ 3/ 0.52/ 1.00 521ms total, 95969.29 ops/sec
LPUSH, batch 50/5 min/max/avg/p95: 0/ 2/ 0.20/ 1.00 200ms total, 250000.00 ops/sec
LRANGE 10, 1/5 min/max/avg/p95: 0/ 1/ 0.03/ 0.00 1562ms total, 32010.24 ops/sec
LRANGE 10, 50/5 min/max/avg/p95: 0/ 4/ 0.69/ 1.00 690ms total, 72463.77 ops/sec
LRANGE 10, batch 50/5 min/max/avg/p95: 0/ 2/ 0.39/ 1.00 393ms total, 127226.46 ops/sec
LRANGE 100, 1/5 min/max/avg/p95: 0/ 3/ 0.06/ 1.00 3009ms total, 16616.82 ops/sec
LRANGE 100, 50/5 min/max/avg/p95: 0/ 5/ 1.85/ 3.00 1850ms total, 27027.03 ops/sec
LRANGE 100, batch 50/5 min/max/avg/p95: 2/ 4/ 2.15/ 3.00 2153ms total, 23223.41 ops/sec
SET 4MiB buf, 1/5 min/max/avg/p95: 1/ 5/ 1.91/ 3.00 957ms total, 522.47 ops/sec
SET 4MiB buf, 50/5 min/max/avg/p95: 13/ 109/ 94.20/ 102.00 987ms total, 506.59 ops/sec
SET 4MiB buf, batch 50/5 min/max/avg/p95: 90/ 107/ 93.10/ 107.00 931ms total, 537.06 ops/sec
GET 4MiB str, 1/5 min/max/avg/p95: 4/ 16/ 5.97/ 10.00 598ms total, 167.22 ops/sec
GET 4MiB str, 50/5 min/max/avg/p95: 10/ 249/ 179.47/ 231.90 454ms total, 220.26 ops/sec
GET 4MiB str, batch 50/5 min/max/avg/p95: 215/ 226/ 220.50/ 226.00 441ms total, 226.76 ops/sec
GET 4MiB buf, 1/5 min/max/avg/p95: 3/ 26/ 6.55/ 11.95 658ms total, 151.98 ops/sec
GET 4MiB buf, 50/5 min/max/avg/p95: 11/ 265/ 186.73/ 241.90 469ms total, 213.22 ops/sec
GET 4MiB buf, batch 50/5 min/max/avg/p95: 226/ 247/ 236.50/ 247.00 473ms total, 211.42 ops/sec
End of tests. Total time elapsed: 44952 ms
PING, 1/5 min/max/avg/p95: 0/ 4/ 0.02/ 0.00 1223ms total, 40883.07 ops/sec
PING, 50/5 min/max/avg/p95: 0/ 3/ 0.50/ 1.00 497ms total, 100603.62 ops/sec
PING, batch 50/5 min/max/avg/p95: 0/ 1/ 0.15/ 1.00 308ms total, 324675.32 ops/sec
SET 4B str, 1/5 min/max/avg/p95: 0/ 2/ 0.03/ 0.00 1402ms total, 35663.34 ops/sec
SET 4B str, 50/5 min/max/avg/p95: 0/ 2/ 0.53/ 1.00 534ms total, 93632.96 ops/sec
SET 4B str, batch 50/5 min/max/avg/p95: 0/ 1/ 0.19/ 1.00 392ms total, 255102.04 ops/sec
SET 4B buf, 1/5 min/max/avg/p95: 0/ 2/ 0.05/ 1.00 2433ms total, 20550.76 ops/sec
SET 4B buf, 50/5 min/max/avg/p95: 0/ 5/ 1.65/ 3.00 1652ms total, 30266.34 ops/sec
SET 4B buf, batch 50/5 min/max/avg/p95: 0/ 3/ 0.36/ 1.00 726ms total, 137741.05 ops/sec
GET 4B str, 1/5 min/max/avg/p95: 0/ 1/ 0.03/ 0.00 1314ms total, 38051.75 ops/sec
GET 4B str, 50/5 min/max/avg/p95: 0/ 3/ 0.53/ 1.00 529ms total, 94517.96 ops/sec
GET 4B str, batch 50/5 min/max/avg/p95: 0/ 1/ 0.16/ 1.00 328ms total, 304878.05 ops/sec
GET 4B buf, 1/5 min/max/avg/p95: 0/ 2/ 0.03/ 0.00 1389ms total, 35997.12 ops/sec
GET 4B buf, 50/5 min/max/avg/p95: 0/ 2/ 0.52/ 1.00 519ms total, 96339.11 ops/sec
GET 4B buf, batch 50/5 min/max/avg/p95: 0/ 1/ 0.16/ 1.00 168ms total, 297619.05 ops/sec
SET 4KiB str, 1/5 min/max/avg/p95: 0/ 3/ 0.03/ 0.00 1670ms total, 29940.12 ops/sec
SET 4KiB str, 50/5 min/max/avg/p95: 0/ 5/ 0.94/ 2.00 941ms total, 53134.96 ops/sec
SET 4KiB str, batch 50/5 min/max/avg/p95: 0/ 2/ 0.49/ 1.00 984ms total, 101626.02 ops/sec
SET 4KiB buf, 1/5 min/max/avg/p95: 0/ 1/ 0.05/ 0.00 2423ms total, 20635.58 ops/sec
SET 4KiB buf, 50/5 min/max/avg/p95: 0/ 5/ 1.60/ 3.00 1598ms total, 31289.11 ops/sec
SET 4KiB buf, batch 50/5 min/max/avg/p95: 0/ 1/ 0.41/ 1.00 825ms total, 121212.12 ops/sec
GET 4KiB str, 1/5 min/max/avg/p95: 0/ 1/ 0.03/ 0.00 1483ms total, 33715.44 ops/sec
GET 4KiB str, 50/5 min/max/avg/p95: 0/ 3/ 0.69/ 1.00 691ms total, 72358.90 ops/sec
GET 4KiB str, batch 50/5 min/max/avg/p95: 0/ 2/ 0.38/ 1.00 759ms total, 131752.31 ops/sec
GET 4KiB buf, 1/5 min/max/avg/p95: 0/ 3/ 0.03/ 0.00 1485ms total, 33670.03 ops/sec
GET 4KiB buf, 50/5 min/max/avg/p95: 0/ 3/ 0.80/ 2.00 797ms total, 62735.26 ops/sec
GET 4KiB buf, batch 50/5 min/max/avg/p95: 0/ 2/ 0.39/ 1.00 396ms total, 126262.63 ops/sec
INCR, 1/5 min/max/avg/p95: 0/ 2/ 0.03/ 0.00 1376ms total, 36337.21 ops/sec
INCR, 50/5 min/max/avg/p95: 0/ 3/ 0.53/ 1.00 529ms total, 94517.96 ops/sec
INCR, batch 50/5 min/max/avg/p95: 0/ 1/ 0.17/ 1.00 339ms total, 294985.25 ops/sec
LPUSH, 1/5 min/max/avg/p95: 0/ 3/ 0.03/ 0.00 1394ms total, 35868.01 ops/sec
LPUSH, 50/5 min/max/avg/p95: 0/ 3/ 0.58/ 1.00 584ms total, 85616.44 ops/sec
LPUSH, batch 50/5 min/max/avg/p95: 0/ 1/ 0.19/ 1.00 383ms total, 261096.61 ops/sec
LRANGE 10, 1/5 min/max/avg/p95: 0/ 4/ 0.03/ 0.00 1706ms total, 29308.32 ops/sec
LRANGE 10, 50/5 min/max/avg/p95: 0/ 3/ 0.71/ 1.00 712ms total, 70224.72 ops/sec
LRANGE 10, batch 50/5 min/max/avg/p95: 0/ 1/ 0.38/ 1.00 772ms total, 129533.68 ops/sec
LRANGE 100, 1/5 min/max/avg/p95: 0/ 1/ 0.06/ 1.00 3026ms total, 16523.46 ops/sec
LRANGE 100, 50/5 min/max/avg/p95: 0/ 5/ 1.88/ 3.00 1882ms total, 26567.48 ops/sec
LRANGE 100, batch 50/5 min/max/avg/p95: 2/ 4/ 2.09/ 3.00 4189ms total, 23872.05 ops/sec
SET 4MiB buf, 1/5 min/max/avg/p95: 1/ 7/ 2.08/ 3.00 1044ms total, 478.93 ops/sec
SET 4MiB buf, 20/5 min/max/avg/p95: 17/ 50/ 40.02/ 46.00 1022ms total, 489.24 ops/sec
SET 4MiB buf, batch 20/5 min/max/avg/p95: 37/ 45/ 39.00/ 44.40 975ms total, 512.82 ops/sec
GET 4MiB str, 1/5 min/max/avg/p95: 4/ 15/ 6.31/ 10.00 634ms total, 157.73 ops/sec
GET 4MiB str, 20/5 min/max/avg/p95: 7/ 124/ 88.27/ 110.80 476ms total, 210.08 ops/sec
GET 4MiB str, batch 20/5 min/max/avg/p95: 76/ 99/ 89.00/ 99.00 446ms total, 224.22 ops/sec
GET 4MiB buf, 1/5 min/max/avg/p95: 4/ 12/ 5.67/ 10.00 568ms total, 176.06 ops/sec
GET 4MiB buf, 20/5 min/max/avg/p95: 14/ 133/ 85.34/ 107.95 458ms total, 218.34 ops/sec
GET 4MiB buf, batch 20/5 min/max/avg/p95: 78/ 96/ 88.00/ 96.00 440ms total, 227.27 ops/sec
End of tests. Total time elapsed: 50421 ms

The hiredis and js parser should most of the time be on the same level. The js parser lacks speed for large responses though.
Therefor the hiredis parser is the default used in node_redis and we recommend using the hiredis parser. To use `hiredis`, do:
Expand Down
34 changes: 17 additions & 17 deletions benchmarks/multi_bench.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -200,67 +200,67 @@ very_large_buf = new Buffer(very_large_str);

tests.push(new Test({descr: 'PING', command: 'ping', args: [], pipeline: 1}));
tests.push(new Test({descr: 'PING', command: 'ping', args: [], pipeline: 50}));
tests.push(new Test({descr: 'PING', command: 'ping', args: [], batch: 50}));
tests.push(new Test({descr: 'PING', command: 'ping', args: [], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'SET 4B str', command: 'set', args: ['foo_rand000000000000', small_str], pipeline: 1}));
tests.push(new Test({descr: 'SET 4B str', command: 'set', args: ['foo_rand000000000000', small_str], pipeline: 50}));
tests.push(new Test({descr: 'SET 4B str', command: 'set', args: ['foo_rand000000000000', small_str], batch: 50}));
tests.push(new Test({descr: 'SET 4B str', command: 'set', args: ['foo_rand000000000000', small_str], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'SET 4B buf', command: 'set', args: ['foo_rand000000000000', small_buf], pipeline: 1}));
tests.push(new Test({descr: 'SET 4B buf', command: 'set', args: ['foo_rand000000000000', small_buf], pipeline: 50}));
tests.push(new Test({descr: 'SET 4B buf', command: 'set', args: ['foo_rand000000000000', small_buf], batch: 50}));
tests.push(new Test({descr: 'SET 4B buf', command: 'set', args: ['foo_rand000000000000', small_buf], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'GET 4B str', command: 'get', args: ['foo_rand000000000000'], pipeline: 1}));
tests.push(new Test({descr: 'GET 4B str', command: 'get', args: ['foo_rand000000000000'], pipeline: 50}));
tests.push(new Test({descr: 'GET 4B str', command: 'get', args: ['foo_rand000000000000'], batch: 50}));
tests.push(new Test({descr: 'GET 4B str', command: 'get', args: ['foo_rand000000000000'], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'GET 4B buf', command: 'get', args: ['foo_rand000000000000'], pipeline: 1, client_opts: { return_buffers: true} }));
tests.push(new Test({descr: 'GET 4B buf', command: 'get', args: ['foo_rand000000000000'], pipeline: 50, client_opts: { return_buffers: true} }));
tests.push(new Test({descr: 'GET 4B buf', command: 'get', args: ['foo_rand000000000000'], batch: 50, client_opts: { return_buffers: true} }));

tests.push(new Test({descr: 'SET 4KiB str', command: 'set', args: ['foo_rand000000000001', large_str], pipeline: 1}));
tests.push(new Test({descr: 'SET 4KiB str', command: 'set', args: ['foo_rand000000000001', large_str], pipeline: 50}));
tests.push(new Test({descr: 'SET 4KiB str', command: 'set', args: ['foo_rand000000000001', large_str], batch: 50}));
tests.push(new Test({descr: 'SET 4KiB str', command: 'set', args: ['foo_rand000000000001', large_str], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'SET 4KiB buf', command: 'set', args: ['foo_rand000000000001', large_buf], pipeline: 1}));
tests.push(new Test({descr: 'SET 4KiB buf', command: 'set', args: ['foo_rand000000000001', large_buf], pipeline: 50}));
tests.push(new Test({descr: 'SET 4KiB buf', command: 'set', args: ['foo_rand000000000001', large_buf], batch: 50}));
tests.push(new Test({descr: 'SET 4KiB buf', command: 'set', args: ['foo_rand000000000001', large_buf], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'GET 4KiB str', command: 'get', args: ['foo_rand000000000001'], pipeline: 1}));
tests.push(new Test({descr: 'GET 4KiB str', command: 'get', args: ['foo_rand000000000001'], pipeline: 50}));
tests.push(new Test({descr: 'GET 4KiB str', command: 'get', args: ['foo_rand000000000001'], batch: 50}));
tests.push(new Test({descr: 'GET 4KiB str', command: 'get', args: ['foo_rand000000000001'], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'GET 4KiB buf', command: 'get', args: ['foo_rand000000000001'], pipeline: 1, client_opts: { return_buffers: true} }));
tests.push(new Test({descr: 'GET 4KiB buf', command: 'get', args: ['foo_rand000000000001'], pipeline: 50, client_opts: { return_buffers: true} }));
tests.push(new Test({descr: 'GET 4KiB buf', command: 'get', args: ['foo_rand000000000001'], batch: 50, client_opts: { return_buffers: true} }));

tests.push(new Test({descr: 'INCR', command: 'incr', args: ['counter_rand000000000000'], pipeline: 1}));
tests.push(new Test({descr: 'INCR', command: 'incr', args: ['counter_rand000000000000'], pipeline: 50}));
tests.push(new Test({descr: 'INCR', command: 'incr', args: ['counter_rand000000000000'], batch: 50}));
tests.push(new Test({descr: 'INCR', command: 'incr', args: ['counter_rand000000000000'], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'LPUSH', command: 'lpush', args: ['mylist', small_str], pipeline: 1}));
tests.push(new Test({descr: 'LPUSH', command: 'lpush', args: ['mylist', small_str], pipeline: 50}));
tests.push(new Test({descr: 'LPUSH', command: 'lpush', args: ['mylist', small_str], batch: 50}));
tests.push(new Test({descr: 'LPUSH', command: 'lpush', args: ['mylist', small_str], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'LRANGE 10', command: 'lrange', args: ['mylist', '0', '9'], pipeline: 1}));
tests.push(new Test({descr: 'LRANGE 10', command: 'lrange', args: ['mylist', '0', '9'], pipeline: 50}));
tests.push(new Test({descr: 'LRANGE 10', command: 'lrange', args: ['mylist', '0', '9'], batch: 50}));
tests.push(new Test({descr: 'LRANGE 10', command: 'lrange', args: ['mylist', '0', '9'], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'LRANGE 100', command: 'lrange', args: ['mylist', '0', '99'], pipeline: 1}));
tests.push(new Test({descr: 'LRANGE 100', command: 'lrange', args: ['mylist', '0', '99'], pipeline: 50}));
tests.push(new Test({descr: 'LRANGE 100', command: 'lrange', args: ['mylist', '0', '99'], batch: 50}));
tests.push(new Test({descr: 'LRANGE 100', command: 'lrange', args: ['mylist', '0', '99'], batch: 50, reqs: num_requests * 2}));

tests.push(new Test({descr: 'SET 4MiB buf', command: 'set', args: ['foo_rand000000000002', very_large_buf], pipeline: 1, reqs: 500}));
tests.push(new Test({descr: 'SET 4MiB buf', command: 'set', args: ['foo_rand000000000002', very_large_buf], pipeline: 50, reqs: 500}));
tests.push(new Test({descr: 'SET 4MiB buf', command: 'set', args: ['foo_rand000000000002', very_large_buf], batch: 50, reqs: 500}));
tests.push(new Test({descr: 'SET 4MiB buf', command: 'set', args: ['foo_rand000000000002', very_large_buf], pipeline: 20, reqs: 500}));
tests.push(new Test({descr: 'SET 4MiB buf', command: 'set', args: ['foo_rand000000000002', very_large_buf], batch: 20, reqs: 500}));

tests.push(new Test({descr: 'GET 4MiB str', command: 'get', args: ['foo_rand000000000002'], pipeline: 1, reqs: 100}));
tests.push(new Test({descr: 'GET 4MiB str', command: 'get', args: ['foo_rand000000000002'], pipeline: 50, reqs: 100}));
tests.push(new Test({descr: 'GET 4MiB str', command: 'get', args: ['foo_rand000000000002'], batch: 50, reqs: 100}));
tests.push(new Test({descr: 'GET 4MiB str', command: 'get', args: ['foo_rand000000000002'], pipeline: 20, reqs: 100}));
tests.push(new Test({descr: 'GET 4MiB str', command: 'get', args: ['foo_rand000000000002'], batch: 20, reqs: 100}));

tests.push(new Test({descr: 'GET 4MiB buf', command: 'get', args: ['foo_rand000000000002'], pipeline: 1, reqs: 100, client_opts: { return_buffers: true} }));
tests.push(new Test({descr: 'GET 4MiB buf', command: 'get', args: ['foo_rand000000000002'], pipeline: 50, reqs: 100, client_opts: { return_buffers: true} }));
tests.push(new Test({descr: 'GET 4MiB buf', command: 'get', args: ['foo_rand000000000002'], batch: 50, reqs: 100, client_opts: { return_buffers: true} }));
tests.push(new Test({descr: 'GET 4MiB buf', command: 'get', args: ['foo_rand000000000002'], pipeline: 20, reqs: 100, client_opts: { return_buffers: true} }));
tests.push(new Test({descr: 'GET 4MiB buf', command: 'get', args: ['foo_rand000000000002'], batch: 20, reqs: 100, client_opts: { return_buffers: true} }));

function next() {
var test = tests.shift();
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