add getIndexingActive() API

[staltz]

We need this for pausing the ssb-friends / ssb-replication-scheduler integration, because indexingActive is triggered right before log.stream to update the indexes, and we need this "right before" behavior, that status doesn't give us.

I haven't thought out this API that well, I think in the future we could find a more developer friendly way of doing this.

[arj03]

Well its nice that this an an obz so you can do something elsewhere depending on the status (changes) on this. Should we add these to the README (forgot to mention that with reset), or are they considered "internal" for now?

[staltz]

(forgot to mention that with reset)

Oh, I added README docs for reset, but not for getIndexingActive. I kind of not so proud about this API, I want to see if it's going to be actually handy for ssb-replication-scheduler.

[arj03]

👍

[github-actions]

Benchmark results

Part	Duration
Create 5000 new messages	553.70ms
Validate 5000 messages	547.25ms
Native to db format 5000 messages	150.71ms
Db to native format 5000 messages	108.31ms
Add 1000 elements	391.63ms
Add 1000 box1 msgs	1184.70ms
Unbox 1000 box1 msgs first run	207.10ms
Unbox 1000 box1 msgs second run	137.41ms
Add 1000 box1 msgs	1142.61ms
Query 1000 msgs first run	46.50ms
Query 1000 msgs second run	17.60ms
Add 1000 box2 msgs	1811.07ms
Unbox 1000 box2 msgs first run	289.76ms
Unbox 1000 box2 msgs second run	223.07ms
Migrate (+db1)	15597.14ms
Migrate (alone)	5703.52ms
Migrate (+db1 +db2)	11732.83ms
Migrate (+db2)	8506.79ms
Migrate continuation (+db2)	1423.82ms
Memory usage without indexes	751.04 MB = 38.18 MB + etc
Initial indexing	945.91ms
Initial indexing maxcpu=86	5148.36ms
Initial indexing compat	938.19ms
Two indexes updating concurrently	1220.40ms
Key one initial	58.56ms
Key two	1.05ms
Key one again	1.23ms
Reboot and key one again	47.51ms
Latest root posts	1010.90ms
Latest posts	9.33ms
Votes one initial	693.63ms
Votes again	0.59ms
HasRoot	480.91ms
HasRoot again	0.48ms
Author one posts	694.68ms
Author two posts	30.31ms
Dedicated author one posts	667.70ms
Dedicated author one posts again	0.79ms
DeleteFeed	3663.45ms
Maximum memory usage	948.33 MB = 62.84 MB + etc
Indexes folder size	10.01mb

[github-actions]

Benchmark results

Part	Duration
Create 5000 new messages	367.25ms
Validate 5000 messages	452.54ms
Native to db format 5000 messages	114.38ms
Db to native format 5000 messages	88.17ms
Add 1000 elements	364.92ms
Add 1000 box1 msgs	928.11ms
Unbox 1000 box1 msgs first run	167.41ms
Unbox 1000 box1 msgs second run	112.29ms
Add 1000 box1 msgs	900.09ms
Query 1000 msgs first run	37.32ms
Query 1000 msgs second run	25.03ms
Add 1000 box2 msgs	1283.62ms
Unbox 1000 box2 msgs first run	209.26ms
Unbox 1000 box2 msgs second run	141.74ms
Migrate (+db1)	12209.75ms
Migrate (alone)	3900.09ms
Migrate (+db1 +db2)	8296.72ms
Migrate (+db2)	6014.54ms
Migrate continuation (+db2)	908.89ms
Memory usage without indexes	751.55 MB = 39.44 MB + etc
Initial indexing	748.04ms
Initial indexing maxcpu=86	3970.25ms
Initial indexing compat	754.72ms
Two indexes updating concurrently	1018.82ms
Key one initial	47.42ms
Key two	0.73ms
Key one again	1.41ms
Reboot and key one again	40.06ms
Latest root posts	793.63ms
Latest posts	9.57ms
Votes one initial	547.25ms
Votes again	1.31ms
HasRoot	379.73ms
HasRoot again	0.31ms
Author one posts	479.03ms
Author two posts	23.97ms
Dedicated author one posts	491.00ms
Dedicated author one posts again	0.73ms
DeleteFeed	2702.94ms
Maximum memory usage	1011.47 MB = 61.32 MB + etc
Indexes folder size	10.01mb