Zebra needs some peers which have a round-trip latency of 2 seconds or less.
If this is a problem for you, please let us know!
## Improving Performance
Zebra usually syncs in 4-12 hours, depending on the network connection.
If you're having trouble syncing, try the following config changes:
### Release Build
Make sure you're using a release build on your native architecture.
If you're using an ARM machine,
[install the Rust compiler for ARM](https://rust-lang.github.io/rustup/installation/other.html).
If you build using the x86_64 tools, Zebra might run really slowly.
Run a release build using the
[`cargo install` command from the README.](https://github.com/ZcashFoundation/zebra#build-and-run-instructions)
### Syncer Lookahead Limit
If your connection is slow, try
[downloading fewer blocks at a time](https://doc.zebra.zfnd.org/zebrad/config/struct.SyncSection.html#structfield.lookahead_limit):
```toml
[sync]
lookahead_limit = 1000
max_concurrent_block_requests = 25
```
### Peer Set Size
If your connection is slow, try [connecting to fewer peers](https://doc.zebra.zfnd.org/zebra_network/struct.Config.html#structfield.peerset_initial_target_size):
```toml
[network]
peerset_initial_target_size = 25
```
### Turn off debug logging
Zebra logs at info level by default.
If Zebra is slow, make sure it is logging at info level:
```toml
[tracing]
filter = 'info'
```
Or restrict debug logging to a specific Zebra component:
```toml
[tracing]
filter = 'info,zebra_network=debug'
```
If you keep on seeing multiple info logs per second, please
[open a bug.](https://github.com/ZcashFoundation/zebra/issues/new/choose)