# Frequently Asked Question


## General

### Is Lovefield production quality?

Yes. As of May 2016, [Inbox by GMail](https://inbox.google.com) heavily relies on
Lovefield to perform complex client-side structural data queries.
[Google Play Movies & TV](
https://chrome.google.com/webstore/detail/google-play-movies-tv/gdijeikdkaembjbdobgfkoidjkpbmlkd)
has shipped with Lovefield for almost two years.

### Lovefield looks similar to XYZ, are you related?

No. Lovefield is built from scratch.


## Technical

### Can Lovefield be used with Angular/Bootstrap/Cordova/D3 ...?

Yes. Lovefield is designed to work with existing JavaScript libraries/frameworks
from the very beginning. The Lovefield team is not omniscient nor omnipotent to
give the answers for interoperability of specific library/framework you had,
however, just assume yes, give it a try, and let us know if it does not work.

### How's Lovefield's performance?

Check our [performance dashboard](https://google.github.io/lovefield/dashboard/src/dashboard.html).
Details of benchmark is provided [here](https://github.com/google/lovefield/tree/master/perf).
Your mileage can vary depending on the platform and browser you use, the best way
to verify is to run the benchmark yourself on your target platform and browser.

### How does Lovefield execute my query?

Lovefield has relational query engine built-in, similar to SQLite, MySQL, or
other relational databases. The difference is that Lovefield does not accept raw
SQL statements; instead, it has a builder-pattern API to build queries.

Lovefield executes queries inside your browser. For more details, checkout
[this video](https://youtu.be/wRiI4p5Uk4E?t=750) or our
[design doc](https://github.com/google/lovefield/blob/master/docs/dd/04_query_engine.md).

### What are the relationships between Lovefield and IndexedDB/WebSQL/Firebase?

Lovefield uses those data stores to persist data, and is designed to work
with different data stores such as IndexedDB and Firebase.

WebSQL is also used as a pure data store. Lovefield does not use WebSQL for
indices or query execution.

### Do you support Safari now?

Only Safari 10 and later versions are supported.

### Lovefield does not seem to work in private browsing of Safari/Firefox?

That is true. Safari does not support any storage in private browsing.
You may consider using Memory.

For Firefox, see [here](https://bugzilla.mozilla.org/show_bug.cgi?id=781982).

### What are the differences between Lovefield and IndexedDB/Firebase?

Lovefield offers relational query with SQL-like syntax, which IndexedDB and
Firebase don't.

### What are the differences between Lovefield and WebSQL?

WebSQL is considered obsolete and does not work cross-browser. Lovefield works
cross-browser.