TW review of the weekly updates (#307)

Author: olgahryniuk

site/news/2025-04-14-weekly-progress-summary.md

@@ -5,61 +5,62 @@ authors:
 tags: [progress, update, weekly]
 ---
 
-This week, the team achieved significant milestones in both the Haskell and Rust simulations, improved cost estimates, and conducted comprehensive analyses of transaction lifecycle and Full Leios simulations.
+This week, the team made substantial progress in both the Haskell and Rust simulations, refined cost estimates, and carried out detailed analyses of the transaction lifecycle and Full Leios simulations.
 
 ### Simulation improvements
 
 #### Haskell simulation
-- Completed first draft of new mini protocols for leios diffusion
-  - Protocols modeled after BlockFetch and node-to-node Tx-Submission from ouroboros-network
-  - IB-relay, EB-relay, Vote-relay for header diffusion and body announcements
-  - IB-fetch, EB-fetch for body diffusion
-  - CatchUp protocol for older blocks
-  - See `simulation/docs/network-spec` for complete protocol details
-- Renamed `short-leios` command to `leios` since it now covers full variant as well
-  - `short-leios` is kept as alias for compatibility
+- Completed the first draft of new mini protocols for Leios diffusion
+  - Modeled protocols after block-fetch and node-to-node transaction submission from `ouroboros-network`
+  - Included IB relay, EB relay, and vote relay for header diffusion and body announcements
+  - Included IB fetch and EB fetch for body diffusion
+  - Worked on the CatchUp protocol for older blocks
+  - See `simulation/docs/network-spec` for full protocol details
+- Renamed `short-leios` command to `leios` as it now covers the full variant as well
+  - `short-leios` is kept as alias for compatibility.
 
 #### Rust simulation
-- Fixed conformance with shared trace format
-- Fixed bug with voting logic which was preventing EBs from receiving enough votes to get on-chain
-- Updated visualization to use smaller trace files to prepare for hosting on docs site
+- Fixed conformance issues with the shared trace format
+- Fixed a bug in the voting logic that prevented EBs from receiving enough votes to be included on-chain
+- Updated visualizations to use smaller trace files in preparation for hosting on the documentation site.
 
-### Revisions to cost dashboard
+### Revisions to the cost dashboard
 
 The [cost dashboard](https://leios.cardano-scaling.org/cost-estimator/) was updated with lower and more realistic IO estimates.
 
-### Analysis of transaction lifecycle
+### Transaction lifecycle analysis
 
-The Jupyter notebook [Analysis of transaction lifecycle](https://github.com/input-output-hk/ouroboros-leios/blob/leios-2025w17/analysis/tx-to-block.ipynb) estimates the delay imposed by each of the seven stages of Full Leios as a transaction moves from memory pool to being referenced by a Praos block.
+The Jupyter notebook [Analysis of transaction lifecycle](https://github.com/input-output-hk/ouroboros-leios/blob/leios-2025w17/analysis/tx-to-block.ipynb) estimates the delay introduced at each of the seven stages of Full Leios as a transaction progresses from the memory pool to being referenced by a Praos block.
 
 Key findings from the analysis:
-1. There seems little advantage to moving to stage lengths less than 10 slots
-2. The number of shards should be kept small enough so that the IB rate per shard is high relative to the stage length
+1. Reducing stage lengths below 10 slots offers little benefit
+2. The number of shards should remain low enough to maintain a high IB rate per shard relative to the stage length
 3. Low EB rates result in many orphaned IBs
-4. Realistic parameter settings result in an approximately two-minute delay between transaction submission and its referencing by an RB
+4. With realistic parameters, the delay from transaction submission to its inclusion in an RB is approximately two minutes.
 
 Potential next steps:
-- Translating this model into Delta QSD to include network effects
-- Comparing this model's results to output of the Rust simulator
-- Elaborating the model to represent the memory-pool and ledger variants under consideration
+- Translate the model into Delta QSD to capture network effects
+- Compare the model’s output with results from the Rust simulator
+- Extend the model to account for different memory pool and ledger variants under evaluation.
 
 ### Simulation and analysis of Full Leios
 
 The team conducted comprehensive simulations using both Haskell and Rust simulators at tag [leios-2025w16](https://github.com/input-output-hk/ouroboros-leios/releases/tag/leios-2025w16). The simulations covered 648 scenarios of Full and Short Leios with varied parameters:
+
 - IB production rate
 - IB size
 - EB production rate
 - Stage length
-- CPU constraints
+- CPU constraints.
 
 Two new output files were generated:
-1. Summary of network, disk, and CPU resource usage over the course of the simulation
-2. Vertices and edges of the "Leios graph" showing linkages between transactions, IBs, EBs, RBs, and votes (can be visualized as an interactive web page)
+1. A summary of network, disk, and CPU resource usage over the course of the simulation
+2. The vertices and edges of the Leios graph, showing linkages between transactions, IBs, EBs, RBs, and votes (can be visualized as an interactive web page).
 
 Key findings:
-- Agreement between Rust and Haskell simulations is generally quite close
-- The Haskell simulation experiences network congestion at 16 IB/s, but the Rust simulation does not
-- The Rust simulation uses more CPU at high IB rates than the Haskell simulation
-- The Rust simulation sometimes does not produce enough votes to certify an EB
+- The Rust and Haskell simulations show generally close agreement
+- The Haskell simulation encounters network congestion at 16 IB/s, while the Rust simulation does not
+- The Rust simulation consumes more CPU at high IB rates than the Haskell simulation
+- In some cases, the Rust simulation does not produce enough votes to certify an EB.
 
-Detailed results are available in the Jupyter notebook [analysis/sims/2025w16/analysis.ipynb](https://github.com/input-output-hk/ouroboros-leios/blob/leios-2025w17/analysis/sims/2025w16/analysis.ipynb). 
+Detailed results are available in the Jupyter notebook [analysis/sims/2025w16/analysis.ipynb](https://github.com/input-output-hk/ouroboros-leios/blob/leios-2025w17/analysis/sims/2025w16/analysis.ipynb).