chore(docs): warn that dump() is computationally expensive

CHANGELOG.md

@@ -55,6 +55,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Enabled compilation of examples in `data-structures.mdx` and across Cookbook: PR [#917](https://github.com/tact-lang/tact/pull/917)
 - Removed the Programmatic API page due to frequent changes. To use the API, please refer to the compiler sources: PR [#1184](https://github.com/tact-lang/tact/pull/1184)
 - Added a link to the article by CertiK to Security best practices page: PR [#1185](https://github.com/tact-lang/tact/pull/1185)
+- Added a note on `dump()` being computationally expensive: PR [#1189](https://github.com/tact-lang/tact/pull/1189)
 
 ### Release contributors
 

docs/src/content/docs/book/debug.mdx

@@ -165,6 +165,12 @@ it('should deploy', async () => {
 
 ### Debug with `dump()` {#tests-dump}
 
+:::note
+
+  Calling [`dump(){:tact}`][dump] is computationally expensive and consumes a lot of gas. Be sure to always supply enough Toncoins in your tests to avoid [exit code -14](/book/exit-codes#-14).
+
+:::
+
 To see results of [`dump(){:tact}`][dump] function calls and use ["printf debugging"](#approach) approach, one has to:
 
 1. Put calls to [`dump(){:tact}`][dump] and other [common debugging functions](#debug-functions) in relevant places of the code.

docs/src/content/docs/book/structs-and-messages.mdx

@@ -3,6 +3,8 @@ title: Structs and Messages
 description: "Structs can define complex data types that contain multiple fields of different types, while Messages also have a 32-bit header and are convenient to receive and sent message bodies on TON Blockchain"
 ---
 
+import { Badge } from '@astrojs/starlight/components';
+
 Tact supports a number of [primitive data types](/book/types#primitive-types) that are tailored for smart contract use. However, using individual means of storage often becomes cumbersome, so there are [Structs](#structs) and [Messages](#messages) which allow combining types together.
 
 :::caution
@@ -108,17 +110,19 @@ Messages are almost the same thing as [Structs](#structs) with the only differen
 Tact automatically generates those unique ids (opcodes) for every received Message, but this can be manually overwritten:
 
 ```tact
-// This Message overwrites its unique id with 0x7362d09c
+// This Message overwrites its unique id (opcode) with 0x7362d09c
 message(0x7362d09c) TokenNotification {
     forwardPayload: Slice as remaining;
 }
 ```
 
 This is useful for cases where you want to handle certain opcodes of a given smart contract, such as [Jetton standard](https://github.com/ton-blockchain/TEPs/blob/master/text/0074-jettons-standard.md). The short-list of opcodes this contract is able to process is [given here in FunC](https://github.com/ton-blockchain/token-contract/blob/main/ft/op-codes.fc). They serve as an interface to the smart contract.
 
-A message opcode can be any compile-time (constant) expression which evaluates to a strictly positive integer that fits into 32-bits, so the following is also a valid message declaration:
+<Badge text="Available since Tact 1.6" variant="tip" size="small"/> A message opcode can be any [compile-time](/ref/core-comptime) expression that evaluates to a positive $32$-bit integer, so the following is also valid:
 
 ```tact
+// This Message overwrites its unique id (opcode) with 898001897,
+// which is the evaluated integer value of the specified compile-time expression
 message((crc32("Tact") + 42) & 0xFFFF_FFFF) MsgWithExprOpcode {
     field: Int as uint4;
 }

docs/src/content/docs/ref/core-debug.mdx

@@ -50,6 +50,8 @@ fun dump(arg);
 
 Prints the argument `arg` to the contract's debug console. Evaluated only if the `debug` option in the [configuration file](/book/config) is set to `true{:json}`, otherwise does nothing.
 
+This function is computationally expensive and consumes a lot of gas because it prints the location from which it was called, i.e. the filename, line and column numbers, and the original expression that was the `arg` argument.
+
 Can be applied to the following list of types and values:
 
 * [`Int{:tact}`][int]
@@ -65,7 +67,10 @@ Usage examples:
 
 ```tact
 // Int
-dump(42);
+dump(42); // prints:
+          // File filename.tact:2:1
+          // dump(42)
+          // 42
 
 // Bool
 dump(true);