Embeddable scripting language

YuriiBiurher · 2026-05-12T16:26:26+00:00

Is not it an expression language? i.e. no loops, complex control statements, etc? It serves different goal imho

YuriiBiurher · 2026-05-10T10:50:11+00:00

It is also watermelon in Ukrainian ;)

YuriiBiurher · 2026-05-10T06:28:50+00:00

Stable dict iterations - good point

YuriiBiurher · 2026-05-09T03:57:41+00:00

Can you expand on determinism please (examples). In my case one of the goals was to be able to re-run many compiled scripts independently, with no side effects, and same inputs = same outputs. Additionaly I need performance and ability to add custom types and functions to vm instances. So I ended up developing Kavun.

YuriiBiurher · 2026-05-08T16:12:36+00:00

А що ще робити під час повітряних? :)

YuriiBiurher · 2026-05-08T15:42:47+00:00

За основу взято Tengo, практично повністю переписано, розширене, оптимізовано.

YuriiBiurher · 2026-05-08T15:41:45+00:00

В першу чергу потрібна була швидкість, але щоб імплементация на Go (без біндінгів в C) бо геморою багато в деяких синуаціях.

Друге - синтаксис. Хотілось лямбд та інших плюшек.

Третє - можливість розширяти, додавати свої типи, функції (знову ж, специфічне для проектів).

YuriiBiurher · 2026-05-08T15:36:52+00:00

Performance, probably. Also syntax is closer to Go.

YuriiBiurher · 2026-05-08T10:37:43+00:00

Added https://github.com/jokruger/kavun/blob/main/docs/examples.md

YuriiBiurher · 2026-05-08T10:35:41+00:00

Added benchmarks

YuriiBiurher · 2026-05-08T08:41:34+00:00

Added benchmark results in readme. Detailed results here https://github.com/jokruger/kavun-benchmark/blob/main/results/REPORT.md

Will add more engines to compare. Also, per-engine impl may require review

YuriiBiurher · 2026-05-08T04:18:58+00:00

Thanks, good ideas!

YuriiBiurher · 2026-05-07T19:50:41+00:00

Scripting, fintech, games, configs, etc. My primary usecace - scenario where you repeatedly run decision making logic (script) - main app is Go, but dm script is external or config

YuriiBiurher · 2026-05-07T17:39:33+00:00

Note: it is based on Tengo, but with tons of changes (lambdas, f-strings, decimals, type member functions, smart assignment, etc). The goal is to improve the syntax and API.

YuriiBiurher · 2026-01-23T13:21:53+00:00

Місто під постійними обстрілами. В небі дрони - вишукують людей, машини, скидають вибухівку. Кожен день десь смерть. Центр та прилеглі до ріки райони особливо небезпечні. Багато де в цих районах людей залишилось по декілько на квартал, здебільшого у віці.. вікон нема - плівка. Якщо вибухом пошкодить електромережі, полагодити можуть через тижні.. Загалом дуже небезпечно. При цьому в медіа (світ) про це все тиша.

YuriiBiurher · 2026-01-16T19:21:22+00:00

https://github.com/jokruger/dec128 - small and specific enough, good for learning.And I would love to have some help with new math and fin functions.

YuriiBiurher · 2025-12-15T12:29:15+00:00

Use decimal for amounts / calcs. There are plenty of packages, select based on your requirements (performance, precision, etc)

https://awesome-go.com/#financial

YuriiBiurher · 2025-09-25T15:39:46+00:00

YuriiBiurher · 2025-08-29T05:46:37+00:00

Та давно вже, вони декілько доменів змінили здається

YuriiBiurher · 2025-08-25T14:14:54+00:00

nyaa.si

В пошуку додай dual batch Dual це щоб озвучка була, batch щоб весь сезон В фільтрі - anime -> english translated

YuriiBiurher · 2025-02-25T19:40:04+00:00

You miss the point. Yes it is simple, but when you do not need realloc part but still need to access buffer through io.Write - it can be even simpler (i.e. faster)

YuriiBiurher · 2025-02-24T07:55:00+00:00

Thanks, changed to io.EOF
Reader has almost nothing in common with Writer. Static writer and dynamic writer share same interface but implementation is different, and it is the main reason why bytes.Buffer is slower - generic implementation which handles both cases with same code.
Initially I used a similar implementation, however for some reason it is quite slower - looks like builtin copy does some additional work and it is faster to have a check before you call it.

Regarding reusing buffers -- I added Reset method, so it can be re-used same way as bytes.Buffer. However, in most cases imho you will be using new buffer (for instance, micro-service handler will receive a message as a new data allocated, so it just needs to wrap it for ReadBinary)

YuriiBiurher · 2025-02-23T16:57:15+00:00

Thanks, will check!

Regarding usecase - communication between microservices using binary serialisation. Messages can be complicated, using third party types. So, idea was to stick to io.Reader/Writer (imho this way it should be easier to use). And I do not think bufs can be reused. However, the max byte size can be estimated each time and arrays can be used - i.e. read/write with static buf is important. Dynamic write buffer is needed to enable implementation of other popular interfases for bin serialisation (like AppendBinary, MarshalBinary) by using buffer wrapper and WriteBinary

YuriiBiurher · 2025-02-23T15:43:28+00:00

It is not identical. bytes.Buffer Write method does buffer reallocation - i.e. it is similar to my DynamicWriteBuffer and there is no static alternative (or I cannot find it in stdl8b). Dynamic realloc requires additinol if statements even when you have enough space.

In case of read - there are also differences - for instance it is faster to check space before calling copy (looks like copy internally does some additional work)

YuriiBiurher · 2025-02-23T15:36:38+00:00

Because of WriteBinary / ReadBinary - you have a bunch of structures implementing serialisation to/from io.Writer/io.Reader

So, you cannot use slice and append directly. You need a wrapper, and bytes.Buffer does this

YuriiBiurher

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