Improve README

README.md

@@ -5,20 +5,44 @@ Intended to be a drop-in replacement for [aggregate6](https://github.com/job/agg
 
 Takes a list of whitespace-separated IPs or IP networks and aggregates them to their minimal representation.
 
-## Known discrepancies with `aggregate6`
+## Installation
 
-* `rs-aggregate` accepts subnet and wilcard mask formats in addition to CIDR, ie all these are valid and equivalent:
-  * `1.1.1.0/255.255.255.0`
-  * `1.1.1.0/0.0.0.255`
-  * `1.1.1.0/24`
-* `-m/--max-prefixlen` supports different maximums for each address family as ipv4,ipv6 format
+`rs-aggregate` is built statically. CI-built binaries can be found in the GitHub
+releases for most common platforms. Simply download the appropriate binary and
+place it in your path.
+
+It can also be installed via some software management tools:
+
+### FreeBSD
+```
+pkg install rs-aggregate
+```
+
+### Cargo
+```
+cargo install rs-aggregate
+```
+
+
+## Known differences from `aggregate6`
+
+* `-m/--max-prefixlen` supports different maximums for each address family as
+  ipv4,ipv6 format. A single value is also supported and has the same behaviour
+  as `aggregate6` (apply the same maximum to both address families).
+* `-v` verbose dump is not supported
+* Truncation errors (when host bits are set without the `-t` flag) are printed
+  based on the parsed address, ie. always in CIDR format, whereas `aggregate6`
+  prints errors based on the input.
 
 ## Performance
 
 Performance comparison of `rs-aggregate` vs `aggregate6`. A speedup of >100x is achieved on DFZ data.
 
-Full DFZ (1154968 total, 202729 aggregates):
+### Full DFZ (1154968 total, 202729 aggregates):
 ![dfz perf comparison](doc/perfcomp_all.png)
 
-IPv4 DFZ (968520 total, 154061 aggregates):
+### IPv4 DFZ (968520 total, 154061 aggregates):
 ![ipv4 dfz perf comparison](doc/perfcomp_v4.png)
+
+### 1024 random prefixes (startup time):
+![startup time comparison](doc/perfcomp_startup.png)