Intern addresses as `&[G; 32]` to cut kernel FFT cost by arthurpaulino · Pull Request #417 · argumentcomputer/ix

arthurpaulino · 2026-05-19T18:37:53Z

Replace the by-value [G; 32] address type with type Addr = &[G; 32]. Aiur store content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument.

lake exe kernel String.Internal.append: total FFT 2515875651 ->
2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

gabriel-barrett · 2026-05-19T21:46:30Z

 -- io_get_info is unconstrained; the prover provides (0, 0) for blob addresses.
 -- Soundness: if the prover lies and skips a real constant, type checking will fail.
- let (_, len) = io_get_info(addr);
+ let (_, len) = io_get_info(load(addr));


I believe this is doing a lookup and loading the addresses into columns JUST to get a hint. The hint should somehow come from the pointer alone. Is this possible? Perhaps that will need a new io_load_info operation or something?

Replace the by-value `[G; 32]` address type with `type Addr = &[G; 32]`. Aiur `store` content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument. `lake exe kernel String.Internal.append`: total FFT 2515875651 -> 2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

arthurpaulino · 2026-05-19T18:37:53Z

Replace the by-value [G; 32] address type with type Addr = &[G; 32]. Aiur store content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument.

lake exe kernel String.Internal.append: total FFT 2515875651 ->
2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

gabriel-barrett · 2026-05-19T21:46:30Z

 -- io_get_info is unconstrained; the prover provides (0, 0) for blob addresses.
 -- Soundness: if the prover lies and skips a real constant, type checking will fail.
- let (_, len) = io_get_info(addr);
+ let (_, len) = io_get_info(load(addr));


I believe this is doing a lookup and loading the addresses into columns JUST to get a hint. The hint should somehow come from the pointer alone. Is this possible? Perhaps that will need a new io_load_info operation or something?

Replace the by-value `[G; 32]` address type with `type Addr = &[G; 32]`. Aiur `store` content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument. `lake exe kernel String.Internal.append`: total FFT 2515875651 -> 2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

arthurpaulino · 2026-05-19T18:37:53Z

Replace the by-value [G; 32] address type with type Addr = &[G; 32]. Aiur store content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument.

lake exe kernel String.Internal.append: total FFT 2515875651 ->
2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

gabriel-barrett · 2026-05-19T21:46:30Z

 -- io_get_info is unconstrained; the prover provides (0, 0) for blob addresses.
 -- Soundness: if the prover lies and skips a real constant, type checking will fail.
- let (_, len) = io_get_info(addr);
+ let (_, len) = io_get_info(load(addr));


I believe this is doing a lookup and loading the addresses into columns JUST to get a hint. The hint should somehow come from the pointer alone. Is this possible? Perhaps that will need a new io_load_info operation or something?

Replace the by-value `[G; 32]` address type with `type Addr = &[G; 32]`. Aiur `store` content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument. `lake exe kernel String.Internal.append`: total FFT 2515875651 -> 2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

arthurpaulino · 2026-05-19T18:37:53Z

Replace the by-value [G; 32] address type with type Addr = &[G; 32]. Aiur store content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument.

lake exe kernel String.Internal.append: total FFT 2515875651 ->
2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

gabriel-barrett · 2026-05-19T21:46:30Z

 -- io_get_info is unconstrained; the prover provides (0, 0) for blob addresses.
 -- Soundness: if the prover lies and skips a real constant, type checking will fail.
- let (_, len) = io_get_info(addr);
+ let (_, len) = io_get_info(load(addr));


I believe this is doing a lookup and loading the addresses into columns JUST to get a hint. The hint should somehow come from the pointer alone. Is this possible? Perhaps that will need a new io_load_info operation or something?

Replace the by-value `[G; 32]` address type with `type Addr = &[G; 32]`. Aiur `store` content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument. `lake exe kernel String.Internal.append`: total FFT 2515875651 -> 2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

arthurpaulino · 2026-05-19T18:37:53Z

Replace the by-value [G; 32] address type with type Addr = &[G; 32]. Aiur store content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument.

lake exe kernel String.Internal.append: total FFT 2515875651 ->
2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

gabriel-barrett · 2026-05-19T21:46:30Z

 -- io_get_info is unconstrained; the prover provides (0, 0) for blob addresses.
 -- Soundness: if the prover lies and skips a real constant, type checking will fail.
- let (_, len) = io_get_info(addr);
+ let (_, len) = io_get_info(load(addr));


I believe this is doing a lookup and loading the addresses into columns JUST to get a hint. The hint should somehow come from the pointer alone. Is this possible? Perhaps that will need a new io_load_info operation or something?

Replace the by-value `[G; 32]` address type with `type Addr = &[G; 32]`. Aiur `store` content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument. `lake exe kernel String.Internal.append`: total FFT 2515875651 -> 2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

arthurpaulino · 2026-05-19T18:37:53Z

Replace the by-value [G; 32] address type with type Addr = &[G; 32]. Aiur store content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument.

lake exe kernel String.Internal.append: total FFT 2515875651 ->
2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

gabriel-barrett · 2026-05-19T21:46:30Z

 -- io_get_info is unconstrained; the prover provides (0, 0) for blob addresses.
 -- Soundness: if the prover lies and skips a real constant, type checking will fail.
- let (_, len) = io_get_info(addr);
+ let (_, len) = io_get_info(load(addr));


I believe this is doing a lookup and loading the addresses into columns JUST to get a hint. The hint should somehow come from the pointer alone. Is this possible? Perhaps that will need a new io_load_info operation or something?

Replace the by-value `[G; 32]` address type with `type Addr = &[G; 32]`. Aiur `store` content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument. `lake exe kernel String.Internal.append`: total FFT 2515875651 -> 2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

arthurpaulino · 2026-05-19T18:37:53Z

Replace the by-value [G; 32] address type with type Addr = &[G; 32]. Aiur store content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument.

lake exe kernel String.Internal.append: total FFT 2515875651 ->
2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

gabriel-barrett · 2026-05-19T21:46:30Z

 -- io_get_info is unconstrained; the prover provides (0, 0) for blob addresses.
 -- Soundness: if the prover lies and skips a real constant, type checking will fail.
- let (_, len) = io_get_info(addr);
+ let (_, len) = io_get_info(load(addr));


I believe this is doing a lookup and loading the addresses into columns JUST to get a hint. The hint should somehow come from the pointer alone. Is this possible? Perhaps that will need a new io_load_info operation or something?

Replace the by-value `[G; 32]` address type with `type Addr = &[G; 32]`. Aiur `store` content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument. `lake exe kernel String.Internal.append`: total FFT 2515875651 -> 2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

arthurpaulino · 2026-05-19T18:37:53Z

Replace the by-value [G; 32] address type with type Addr = &[G; 32]. Aiur store content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument.

lake exe kernel String.Internal.append: total FFT 2515875651 ->
2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

gabriel-barrett · 2026-05-19T21:46:30Z

 -- io_get_info is unconstrained; the prover provides (0, 0) for blob addresses.
 -- Soundness: if the prover lies and skips a real constant, type checking will fail.
- let (_, len) = io_get_info(addr);
+ let (_, len) = io_get_info(load(addr));


I believe this is doing a lookup and loading the addresses into columns JUST to get a hint. The hint should somehow come from the pointer alone. Is this possible? Perhaps that will need a new io_load_info operation or something?

Replace the by-value `[G; 32]` address type with `type Addr = &[G; 32]`. Aiur `store` content-dedups structurally equal arrays to one canonical pointer, so address equality reduces to pointer subtraction and every function carrying addresses drops 31 columns per address argument. `lake exe kernel String.Internal.append`: total FFT 2515875651 -> 2152947064 (-14.4%), total width 48210 -> 37903. ixvm test suite: 283 pass, 0 fail.

arthurpaulino requested a review from gabriel-barrett May 19, 2026 18:37

arthurpaulino force-pushed the ap/kernel-opts branch from b9e71b6 to 157da06Compare May 19, 2026 21:03

gabriel-barrett reviewed May 19, 2026
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arthurpaulino mentioned this pull request May 19, 2026
io_load_info#419
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arthurpaulino force-pushed the ap/kernel-opts branch from 157da06 to b004695Compare May 19, 2026 21:52

arthurpaulino enabled auto-merge (squash) May 19, 2026 21:52

gabriel-barrett reviewed May 19, 2026
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Comment threadIx/IxVM/Ingress.lean

arthurpaulino force-pushed the ap/kernel-opts branch from b004695 to f205dbaCompare May 19, 2026 23:26

gabriel-barrett approved these changes May 19, 2026
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arthurpaulino merged commit 51f270b into mainMay 19, 2026
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arthurpaulino deleted the ap/kernel-opts branch May 19, 2026 23:33