script: Add watch command

[joamaki]

The 'watch' command allows watching a table for changes, similar to the cilium-dbg statedb <table> --watch flag. The "strike out" support is ported from cilium-dbg/cmd/statedb.go.

The plan is to eventually replace the "cilium-dbg statedb" with the script commands.

❯ go run .
> hive start
...
time=2024-10-11T12:25:45.489+02:00 level=INFO msg=Started duration=177.609µs
> db watch ex
Name    X
one     1
two     2
count   0
count   1
count   2
...
^C (interrupted)
> 

[github-actions]

$ make test
go: downloading github.com/mitchellh/mapstructure v1.5.0
go: downloading golang.org/x/sys v0.17.0
go: downloading golang.org/x/tools v0.17.0
go: downloading github.com/spf13/cast v1.6.0
go: downloading github.com/fsnotify/fsnotify v1.7.0
go: downloading github.com/sagikazarmark/slog-shim v0.1.0
go: downloading github.com/spf13/afero v1.11.0
go: downloading github.com/subosito/gotenv v1.6.0
go: downloading github.com/hashicorp/hcl v1.0.0
go: downloading gopkg.in/ini.v1 v1.67.0
go: downloading github.com/magiconair/properties v1.8.7
go: downloading github.com/pelletier/go-toml/v2 v2.1.0
go: downloading golang.org/x/text v0.14.0
	github.com/cilium/statedb/reconciler/benchmark		coverage: 0.0% of statements
	github.com/cilium/statedb/reconciler/example		coverage: 0.0% of statements
ok  	github.com/cilium/statedb	26.324s	coverage: 82.6% of statements
ok  	github.com/cilium/statedb/index	0.005s	coverage: 28.7% of statements
ok  	github.com/cilium/statedb/internal	0.008s	coverage: 46.7% of statements
ok  	github.com/cilium/statedb/part	2.604s	coverage: 82.9% of statements
ok  	github.com/cilium/statedb/reconciler	0.311s	coverage: 88.4% of statements
-----
$ make bench
go test ./... -bench . -benchmem -test.run xxx
goos: linux
goarch: amd64
pkg: github.com/cilium/statedb
cpu: AMD EPYC 7763 64-Core Processor                
BenchmarkDB_WriteTxn_1-4                    	  447801	      2627 ns/op	    380630 objects/sec	    2816 B/op	      32 allocs/op
BenchmarkDB_WriteTxn_10-4                   	 1230457	       976.3 ns/op	   1024320 objects/sec	     743 B/op	      10 allocs/op
BenchmarkDB_WriteTxn_100-4                  	 1450978	       777.9 ns/op	   1285511 objects/sec	     601 B/op	       7 allocs/op
BenchmarkDB_WriteTxn_1000-4                 	 1491226	       817.0 ns/op	   1224038 objects/sec	     550 B/op	       7 allocs/op
BenchmarkDB_WriteTxn_100_SecondaryIndex-4   	  510188	      2293 ns/op	    436146 objects/sec	    1503 B/op	      37 allocs/op
BenchmarkDB_Modify-4                        	    1300	    932590 ns/op	   1072283 objects/sec	  774010 B/op	    8462 allocs/op
BenchmarkDB_GetInsert-4                     	    1226	    998232 ns/op	   1001772 objects/sec	  758448 B/op	    8463 allocs/op
BenchmarkDB_RandomInsert-4                  	    2331	    500470 ns/op	   1998120 objects/sec	  402258 B/op	    7098 allocs/op
BenchmarkDB_RandomReplace-4                 	     318	   3737888 ns/op	    267531 objects/sec	 2357934 B/op	   48572 allocs/op
BenchmarkDB_SequentialInsert-4              	    1536	    802777 ns/op	   1245676 objects/sec	  552883 B/op	    7290 allocs/op
BenchmarkDB_Changes_Baseline-4              	    1262	    943833 ns/op	   1059510 objects/sec	  553184 B/op	   10252 allocs/op
BenchmarkDB_Changes-4                       	     694	   1707025 ns/op	    585815 objects/sec	  993498 B/op	   14494 allocs/op
BenchmarkDB_RandomLookup-4                  	   21283	     53490 ns/op	  18695228 objects/sec	     160 B/op	       1 allocs/op
BenchmarkDB_SequentialLookup-4              	   27447	     43676 ns/op	  22895678 objects/sec	       0 B/op	       0 allocs/op
BenchmarkDB_Prefix_SecondaryIndex-4         	    7531	    149066 ns/op	   6708464 objects/sec	   93893 B/op	    1044 allocs/op
BenchmarkDB_FullIteration_All-4             	     990	   1229925 ns/op	  81305873 objects/sec	     480 B/op	      12 allocs/op
BenchmarkDB_FullIteration_Get-4             	     220	   5449010 ns/op	  18351988 objects/sec	       0 B/op	       0 allocs/op
BenchmarkDB_PropagationDelay-4              	  507802	      2374 ns/op	        20.00 50th_µs	        25.00 90th_µs	        83.00 99th_µs	    1589 B/op	      24 allocs/op
PASS
ok  	github.com/cilium/statedb	27.772s
PASS
ok  	github.com/cilium/statedb/index	0.003s
PASS
ok  	github.com/cilium/statedb/internal	0.003s
goos: linux
goarch: amd64
pkg: github.com/cilium/statedb/part
cpu: AMD EPYC 7763 64-Core Processor                
Benchmark_Insert_RootOnlyWatch-4    	    8944	    131955 ns/op	   7578330 objects/sec	  104165 B/op	    2041 allocs/op
Benchmark_Insert-4                  	    6165	    181243 ns/op	   5517458 objects/sec	  219061 B/op	    3065 allocs/op
Benchmark_Modify-4                  	    7767	    140561 ns/op	   7114366 objects/sec	  212180 B/op	    1205 allocs/op
Benchmark_GetInsert-4               	    6831	    171721 ns/op	   5823405 objects/sec	  212454 B/op	    1204 allocs/op
Benchmark_Replace-4                 	27010606	        44.72 ns/op	  22360342 objects/sec	       0 B/op	       0 allocs/op
Benchmark_Replace_RootOnlyWatch-4   	27019929	        44.81 ns/op	  22314391 objects/sec	       0 B/op	       0 allocs/op
Benchmark_txn_1-4                   	 3028470	       392.3 ns/op	   2548826 objects/sec	     448 B/op	       7 allocs/op
Benchmark_txn_10-4                  	 7507927	       158.2 ns/op	   6319864 objects/sec	     154 B/op	       2 allocs/op
Benchmark_txn_100-4                 	 8356810	       142.4 ns/op	   7024032 objects/sec	     224 B/op	       2 allocs/op
Benchmark_txn_1000-4                	 7449506	       161.2 ns/op	   6203308 objects/sec	     216 B/op	       2 allocs/op
Benchmark_txn_delete_1-4            	 3211776	       377.7 ns/op	   2647383 objects/sec	     856 B/op	       6 allocs/op
Benchmark_txn_delete_10-4           	 8422850	       141.5 ns/op	   7069384 objects/sec	     132 B/op	       1 allocs/op
Benchmark_txn_delete_100-4          	10429628	       113.6 ns/op	   8799292 objects/sec	      60 B/op	       1 allocs/op
Benchmark_txn_delete_1000-4         	11106276	       107.2 ns/op	   9332549 objects/sec	      26 B/op	       1 allocs/op
Benchmark_Get-4                     	   38956	     31527 ns/op	  31719293 objects/sec	       0 B/op	       0 allocs/op
Benchmark_Iterate-4                 	  173866	      6840 ns/op	 146192759 objects/sec	      80 B/op	       3 allocs/op
Benchmark_Hashmap_Insert-4          	   15936	     75155 ns/op	  13305931 objects/sec	   86554 B/op	      64 allocs/op
Benchmark_Hashmap_Get_Uint64-4      	  153817	      7820 ns/op	 127880383 objects/sec	       0 B/op	       0 allocs/op
Benchmark_Hashmap_Get_Bytes-4       	  149142	      8128 ns/op	 123027015 objects/sec	       0 B/op	       0 allocs/op
Benchmark_Uint64Map_Random-4        	    1380	    854271 ns/op	   1170589 items/sec	 2700217 B/op	    9017 allocs/op
Benchmark_Uint64Map_Sequential-4    	    1508	    801810 ns/op	   1247180 items/sec	 2492407 B/op	    9749 allocs/op
PASS
ok  	github.com/cilium/statedb/part	28.252s
PASS
ok  	github.com/cilium/statedb/reconciler	0.004s
?   	github.com/cilium/statedb/reconciler/benchmark	[no test files]
?   	github.com/cilium/statedb/reconciler/example	[no test files]
go run ./reconciler/benchmark -quiet
1000000 objects reconciled in 2.94 seconds (batch size 1000)
Throughput 340550.97 objects per second
Allocated 6011300 objects, 424755kB bytes, 526240kB bytes still in use

[pippolo84]

💯