# Why Elasticsearch 1.7.3 is faster 20% than 1.7.5?
**URL:** https://discuss.elastic.co/t/why-elasticsearch-1-7-3-is-faster-20-than-1-7-5/67102
**Category:** Elasticsearch
**Created:** [November 24, 2016, 11:28am UTC](https://discuss.elastic.co/t/why-elasticsearch-1-7-3-is-faster-20-than-1-7-5/67102 "2016-11-24T11:28:36Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Joomler](https://discuss.elastic.co/u/Joomler)
#### Post date: [November 24, 2016, 11:28am UTC](https://discuss.elastic.co/t/why-elasticsearch-1-7-3-is-faster-20-than-1-7-5/67102/1 "2016-11-24T11:28:36Z")
Why Elasticsearch 1.7.3 is faster 20% than 1.7.5 ?
Absolutely the same config and index data, 30 queries in loop:
1.7.3 - 34s
1.7.5 - 47s
I wanted to upgrade to 2.4 but it even slower. New 5 version too.
So, performance degrade, so strange.
---
### Author:  [@jpountz](https://discuss.elastic.co/u/jpountz)
#### Post date: [November 25, 2016, 2:55pm UTC](https://discuss.elastic.co/t/why-elasticsearch-1-7-3-is-faster-20-than-1-7-5/67102/2 "2016-11-25T14:55:14Z")
What do the queries look like?
---
### Author:  [@Joomler](https://discuss.elastic.co/u/Joomler)
#### Post date: [November 25, 2016, 3:40pm UTC](https://discuss.elastic.co/t/why-elasticsearch-1-7-3-is-faster-20-than-1-7-5/67102/3 "2016-11-25T15:40:22Z")
Like this:
```
"query": {
"filtered": {
"query": {
"bool": {
"must_not": [{"match": {"text": "porn"}}]
"should" : [
{"match" : { "text" : {"query" : '\"apple ipod\"~4', "_name" : "first"} }},
{"match" : { "text" : {"query" : '\"ai bot\"~4', "_name" : "first"} }},
{"match" : { "text" : {"query" : "google", "_name" : "last"} }},
....here go a lot of other match queris......
],
}
},
#"filter": {"terms": {"from_id": "-46461134"}}
}
},
"aggs" : {
"per_tag": {
"terms": {"field": "from_id"},
}
}
}
```
---
### Author:  [@jpountz](https://discuss.elastic.co/u/jpountz)
#### Post date: [November 25, 2016, 4:08pm UTC](https://discuss.elastic.co/t/why-elasticsearch-1-7-3-is-faster-20-than-1-7-5/67102/4 "2016-11-25T16:08:24Z")
Looking at the changelog, a difference between 1.7.3 and 1.7.5 is quite unexpected so I suspect something like the 1.7.5 instance had a colder FS/filter cache than the 1.7.3 instance.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [December 23, 2016, 4:08pm UTC](https://discuss.elastic.co/t/why-elasticsearch-1-7-3-is-faster-20-than-1-7-5/67102/5 "2016-12-23T16:08:41Z")
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