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solana-with-rpc-optimizations
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do simple math without floats

This commit is contained in:
Tao Zhu 2022-03-31 10:10:18 -05:00 committed by Tao Zhu
parent 6ba4e870c4
commit 997db7637c
1 changed files with 10 additions and 5 deletions
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15
runtime/src/execute_cost_table.rs
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@ -9,9 +9,10 @@ use {
};
// prune is rather expensive op, free up bulk space in each operation
// would be more efficient. PRUNE_RATIO defines the after prune table
// size will be original_size * PRUNE_RATIO.
const PRUNE_RATIO: f64 = 0.75;
// would be more efficient. PRUNE_RATIO defines that after prune, table
// size will be original_size * PRUNE_RATIO. The value is defined in
// scale of 100.
const PRUNE_RATIO: usize = 75;
// with 50_000 TPS as norm, weights occurrences '100' per microsec
const OCCURRENCES_WEIGHT: i64 = 100;
@ -85,8 +86,12 @@ impl ExecuteCostTable {
pub fn upsert(&mut self, key: &Pubkey, value: u64) {
let need_to_add = !self.table.contains_key(key);
let current_size = self.get_count();
if current_size == self.capacity && need_to_add {
self.prune_to(&((current_size as f64 * PRUNE_RATIO) as usize));
if current_size >= self.capacity && need_to_add {
let prune_to_size = current_size
.checked_mul(PRUNE_RATIO)
.and_then(|v| v.checked_div(100))
.unwrap_or(self.capacity);
self.prune_to(&prune_to_size);
}
let program_cost = self.table.entry(*key).or_insert(value);