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fix: speed up ConfigOptions creation #3296

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merged 1 commit into from
Aug 30, 2022
Merged

fix: speed up ConfigOptions creation #3296

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6 changes: 3 additions & 3 deletions datafusion/core/src/config.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -207,19 +207,19 @@ impl Default for ConfigOptions {
impl ConfigOptions {
/// Create new ConfigOptions struct
pub fn new() -> Self {
let mut options = HashMap::new();
let built_in = BuiltInConfigs::new();
let mut options = HashMap::with_capacity(built_in.config_definitions.len());
for config_def in &built_in.config_definitions {
options.insert(config_def.key.clone(), config_def.default_value.clone());
}
Self { options }
}

/// Create new ConfigOptions struct, taking values from environment variables where possible.
/// For example, setting DATAFUSION_EXECUTION_BATCH_SIZE to control `datafusion.execution.batch_size`.
/// For example, setting `DATAFUSION_EXECUTION_BATCH_SIZE` to control `datafusion.execution.batch_size`.
pub fn from_env() -> Self {
let mut options = HashMap::new();
let built_in = BuiltInConfigs::new();
let mut options = HashMap::with_capacity(built_in.config_definitions.len());
for config_def in &built_in.config_definitions {
let config_value = {
let mut env_key = config_def.key.replace('.', "_");
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